| 单词 | mitosis |
| 例句 | When the time for swarming comes, and the old queen prepares to leave with her part of the population, it is as though the hive were involved in mitosis. The Lives of a Cell 1974-01-01T00:00:00Z I don’t want to forget what I’ve learned, so I make mental diagrams of the respiratory system, the process of condensation, meiosis and mitosis. The Queen of Water 1996-01-01T00:00:00Z The centrioles, which hoist the microtubules on which chromosomes are strung for mitosis, are similar separate creatures; when not busy with mitosis, they become the basal bodies to which cilia are attached. The Lives of a Cell 1974-01-01T00:00:00Z Working as lab partners, we had to separate the slides of onion root tip cells into the phases of mitosis they represented and label them accordingly. Twilight 2005-10-05T00:00:00Z Anything that disturbs mitosis is therefore a grave threat to the welfare of the organism affected and to its descendants. Silent Spring 1962-09-27T00:00:00Z This is accomplished by the process of mitosis, or nuclear division. Silent Spring 1962-09-27T00:00:00Z In another, a flower girl splits in two, like a cell undergoing mitosis. Paul McCarthy at Hauser & Wirth: A horror show on a grand, exquisite scale 2017-08-14T04:00:00Z Lyall Bush, executive director of the nonprofit Northwest Film Forum, says that during the past few years, he's witnessed a proliferation of creativity that reminds him of cells multiplying in mitosis. Pipeline to Sundance: Collaboration is key to Seattle's indie filmmakers 2011-01-14T23:45:39Z For decades, researchers have believed that a class of drugs called microtubule poisons treat cancerous tumors by halting mitosis, or the division of cells. Common chemotherapy drugs don't work like doctors thought, with big implications for drug discovery 2023-10-26T04:00:00Z The zygote undergoes mitosis without cytokinesis, resulting in a single-celled, multinucleate mass visible to the naked eye. Fundamentals of Biology 2015-01-01T00:00:00Z Usually the cell will divide after mitosis in a process called cytokinesis in which the cytoplasm is divided and two daughter cells are formed. Concepts of Biology 2013-04-25T00:00:00Z They named the trio of mutations MiMe, short for “mitosis instead of meiosis.” ‘Game changer.’ Scientists are genetically engineering crops to clone themselves 2023-05-17T04:00:00Z But it is most known as a homework help platform where, for $15.95 per month, students can find ready answers to millions of questions on course topics like relativity or mitosis. F.T.C. Accuses Ed Tech Firm Chegg of ‘Careless’ Data Security 2022-10-31T04:00:00Z Instead, these drugs alter mitosis -- sometimes enough to cause new cancer cells to die and the disease to regress. Common chemotherapy drugs don't work like doctors thought, with big implications for drug discovery 2023-10-26T04:00:00Z The solitary amoebas undergo mitosis, and may aggregate to form aggregated amoebas. Fundamentals of Biology 2015-01-01T00:00:00Z The first portion of the mitotic phase, mitosis, is composed of five stages, which accomplish nuclear division. Concepts of Biology 2013-04-25T00:00:00Z Many naturally apomictic plants instead create gametes through mitosis, with no change in the chromosome count. ‘Game changer.’ Scientists are genetically engineering crops to clone themselves 2023-05-17T04:00:00Z In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis or meiosis plus fertilization. Biology for AP Courses 2022-06-09T00:00:00Z Normally, a cell's chromosomes are duplicated before the two identical sets migrate to opposite ends of the cell mitosis in a process called chromosomal segregation. Common chemotherapy drugs don't work like doctors thought, with big implications for drug discovery 2023-10-26T04:00:00Z The zygote undergoes mitosis and meiosis, resulting in more 1 n solitary amoebas. Fundamentals of Biology 2015-01-01T00:00:00Z Figure 6.4 Animal cell mitosis is divided into five stages—prophase, prometaphase, metaphase, anaphase, and telophase—visualized here by light microscopy with fluorescence. Concepts of Biology 2013-04-25T00:00:00Z A cell replicates, or copies, all of its chromosomes before entering either mitosis or meiosis. Miller & Levine Biology 2018-01-01T00:00:00Z In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis or meiosis plus fertilization. Biology for AP Courses 2022-06-09T00:00:00Z Weaver and her colleagues wanted to know if other microtubule poisons work the same way as paclitaxel -- not by stopping mitosis but by messing it up. Common chemotherapy drugs don't work like doctors thought, with big implications for drug discovery 2023-10-26T04:00:00Z In the multicellular Ulva, a sporophyte grows by mitosis after fertilization. Fundamentals of Biology 2015-01-01T00:00:00Z Which of the following is the correct order of events in mitosis? Concepts of Biology 2013-04-25T00:00:00Z In mitosis, each daughter cell receives a complete diploid set of chromosomes. Miller & Levine Biology 2018-01-01T00:00:00Z In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis or meiosis plus fertilization. Biology for AP Courses 2022-06-09T00:00:00Z "So, after mitosis you have daughter cells that are no longer genetically identical and have lost chromosomes," Weaver says. Common chemotherapy drugs don't work like doctors thought, with big implications for drug discovery 2023-10-26T04:00:00Z Cells are formed through mitosis at the innermost layers. Fundamentals of Biology 2015-01-01T00:00:00Z During telophase, all of the events that set up the duplicated chromosomes for mitosis during the first three phases are reversed. Concepts of Biology 2013-04-25T00:00:00Z A diploid cell that enters mitosis with eight chromosomes will produce two diploid daughter cells, each with eight chromosomes. Miller & Levine Biology 2018-01-01T00:00:00Z The final preparations for the mitotic phase must be completed before the cell is able to enter the first stage of mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Importantly, they also help explain why attempts to find new chemo drugs based solely on stopping mitosis have been so disappointing, Weaver says. Common chemotherapy drugs don't work like doctors thought, with big implications for drug discovery 2023-10-26T04:00:00Z Osteoblasts undergo mitosis and secrete a substance that acts as the framework for bone. Fundamentals of Biology 2015-01-01T00:00:00Z Watch the movie entitled “DIC microscopy of cell division in a newt lung cell” and identify the phases of mitosis. Concepts of Biology 2013-04-25T00:00:00Z The genetic material inside the nucleus condenses and the duplicate chromosomes become visible during the first stage of mitosis called prophase. Miller & Levine Biology 2018-01-01T00:00:00Z Inhibition of mitosis results in decreased white blood count. Biology for AP Courses 2022-06-09T00:00:00Z If osteoblasts and osteocytes are incapable of mitosis, then how are they replenished when old ones die? Anatomy and Physiology 2013-06-19T00:00:00Z The pollen grain undergoes mitosis, producing a generative cell and a tube cell. Fundamentals of Biology 2015-01-01T00:00:00Z The differences in the outcomes of meiosis and mitosis occur because of differences in the behavior of the chromosomes during each process. Concepts of Biology 2013-04-25T00:00:00Z During the M phase of the cell cycle, mitosis forms two nuclei, each with a complete set of the DNA. Miller & Levine Biology 2018-01-01T00:00:00Z Inhibition of mitosis results in increased white blood count. Biology for AP Courses 2022-06-09T00:00:00Z The G2 phase is a second gap phase, during which the cell continues to grow and makes the necessary preparations for mitosis. Anatomy and Physiology 2013-06-19T00:00:00Z The haploid gametophyte produces the male and female gametes by mitosis in distinct multicellular structures. Fundamentals of Biology 2015-01-01T00:00:00Z Most of these differences in the processes occur in meiosis I, which is a very different nuclear division than mitosis. Concepts of Biology 2013-04-25T00:00:00Z Each cell contains the new nucleus formed during mitosis and an equal amount of cytoplasm. Miller & Levine Biology 2018-01-01T00:00:00Z Inhibition of mitosis results in increased white blood count. Biology for AP Courses 2022-06-09T00:00:00Z First, it completes mitosis, during which the contents of the nucleus are equitably pulled apart and distributed between its two halves. Anatomy and Physiology 2013-06-19T00:00:00Z After reaching maturity, the diploid sporophyte produces spores by meiosis, which in turn divide by mitosis to produce the haploid gametophyte. Fundamentals of Biology 2015-01-01T00:00:00Z All of these events occur only in meiosis I, never in mitosis. Concepts of Biology 2013-04-25T00:00:00Z When this protein is present, the mitotic spindle forms and the mitosis phase of the cell cycle is activated. Miller & Levine Biology 2018-01-01T00:00:00Z These budding plants demonstrate asexual reproduction, one of the main purposes of mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Prophase is the first phase of mitosis, during which the loosely packed chromatin coils and condenses into visible chromosomes. Anatomy and Physiology 2013-06-19T00:00:00Z Both microspores and megaspores undergo mitosis, forming the microgametophyte and megagametophyte, respectively. Fundamentals of Biology 2015-01-01T00:00:00Z Figure 7.6 Meiosis and mitosis are both preceded by one round of DNA replication; however, meiosis includes two nuclear divisions. Concepts of Biology 2013-04-25T00:00:00Z Most protists reproduce by mitosis, simply dividing themselves in two. Miller & Levine Biology 2018-01-01T00:00:00Z Astral microtubules are located near the poles, aid in spindle orientation, and are required for the regulation of mitosis. Biology for AP Courses 2022-06-09T00:00:00Z These tiny structures also play a very important role during mitosis. Anatomy and Physiology 2013-06-19T00:00:00Z Most fungi produce a large number of spores, which are haploid cells that can undergo mitosis to form multicellular, haploid individuals. Fundamentals of Biology 2015-01-01T00:00:00Z A chemical is then applied to the cells to arrest mitosis during metaphase. Concepts of Biology 2013-04-25T00:00:00Z Plant growth happens in meristems, or regions of unspecialized cells in which mitosis produces new cells that are ready for differentiation. Miller & Levine Biology 2018-01-01T00:00:00Z The nuclear DNA duplicates by the process of mitosis, which creates an exact replica of the genetic material. Biology for AP Courses 2022-06-09T00:00:00Z Imagine a cell that completed mitosis but never underwent cytokinesis. Anatomy and Physiology 2013-06-19T00:00:00Z Each nucleus undergoes mitosis, resulting in eight ascospores, which are also arranged in a row at the tip of the hyphae. Fundamentals of Biology 2015-01-01T00:00:00Z The gametophyte gives rise to the gametes, or reproductive cells, by mitosis. Concepts of Biology 2013-04-25T00:00:00Z There’s another called “The Biochemist,” where I’m having all these ideas, talking about the zygote, mitosis and meiosis. RZA on the current state of hip-hop: ‘The wisdom is missing’ 2022-04-05T04:00:00Z When we explored mitosis in the Cell Reproduction chapter, you may have examined a root meristem under the microscope. Biology for AP Courses 2022-06-09T00:00:00Z At the G2 checkpoint the cell must be fully prepared for mitosis. Anatomy and Physiology 2013-06-19T00:00:00Z The newly formed zygote grows into a sporophyte that emerges from the gametophyte and grows by mitosis into the next generation sporophyte. Fundamentals of Biology 2015-01-01T00:00:00Z When the haploid spore germinates, it generates a multicellular gametophyte by mitosis. Concepts of Biology 2013-04-25T00:00:00Z They recognized that the distribution of chromosomes during mitosis and meiosis mirrored what was expected of Mendel’s hereditary ‘factors’, and showed that specific chromosomes were associated with sex. The forgotten scientists who paved the way to the double helix 2019-04-15T04:00:00Z Cytokinins are known to delay senescence in leaf tissues, promote mitosis, and stimulate differentiation of the meristem in shoots and roots. Biology for AP Courses 2022-06-09T00:00:00Z Even during mitosis, a crucial stop and go checkpoint in metaphase ensures that the cell is fully prepared to complete cell division. Anatomy and Physiology 2013-06-19T00:00:00Z The pollen tube develops slowly, and the generative cell in the pollen grain divides into two haploid sperm cells by mitosis. Fundamentals of Biology 2015-01-01T00:00:00Z Meiosis II, in which the second round of meiotic division takes place in a way that is similar to mitosis, includes prophase II, prometaphase II, and so on. Concepts of Biology 2013-04-25T00:00:00Z In 1882, he showed with great clarity their behaviour in the replication processes of mitosis and meiosis. The forgotten scientists who paved the way to the double helix 2019-04-15T04:00:00Z A technician is preparing microscope slides that will display the different stages of mitosis from root samples. Biology for AP Courses 2022-06-09T00:00:00Z In the skin, these changes are reflected in decreased mitosis in the stratum basale, leading to a thinner epidermis. Anatomy and Physiology 2013-06-19T00:00:00Z The Ring stage may multiply by mitosis or it may undergo meiosis, forming new 1n gametes of male or female sex types. Fundamentals of Biology 2015-01-01T00:00:00Z In what ways is meiosis II similar to and different from mitosis of a diploid cell? Concepts of Biology 2013-04-25T00:00:00Z For the 475 seventh-graders in the boy’s class, that meant learning about cell mitosis, calculating linear equations and reading “The Giver.” A boy tried to kill himself by jumping from a highway bridge. He killed someone else instead. 2018-12-13T05:00:00Z Although the stages of mitosis are similar for most eukaryotes, the process of cytokinesis is quite different for eukaryotes that have cell walls, such as plant cells. Biology for AP Courses 2022-06-09T00:00:00Z Lymphocytes are fully capable of mitosis and may produce clones of cells with identical properties. Anatomy and Physiology 2013-06-19T00:00:00Z When the haploid spore germinates in a hospitable environment, it generates a multicellular gametophyte by mitosis. Fundamentals of Biology 2015-01-01T00:00:00Z Prokaryotic cells, on the other hand, do not undergo mitosis and therefore have no need for a mitotic spindle. Concepts of Biology 2013-04-25T00:00:00Z Chromosomal instability is a hallmark of cancer that results from ongoing errors in chromosome segregation during mitosis. Chromosomal instability drives metastasis through a cytosolic DNA response 2018-01-16T05:00:00Z Because the events that occur during each of the division stages are analogous to the events of mitosis, the same stage names are assigned. Biology for AP Courses 2022-06-09T00:00:00Z As in mitosis, DNA is replicated in a primary spermatocyte, before it undergoes a cell division called meiosis I. During meiosis I each of the 23 pairs of chromosomes separates. Anatomy and Physiology 2013-06-19T00:00:00Z Inside the anthers’ microsporangia, male gametophytes divide by meiosis to generate haploid microspores, which, in turn, undergo mitosis and give rise to pollen grains. Fundamentals of Biology 2015-01-01T00:00:00Z At the metaphase stage of mitosis, when the chromosomes are lined up in the center of the cell, the chromosomes are at their most compacted. Concepts of Biology 2013-04-25T00:00:00Z During cell division, also known as mitosis, the entire DNA content of the cell is copied, with half going to each new cell. Colourful, creative and close up: Wellcome Images 2017 - BBC News 2017-03-15T04:00:00Z In mitosis, homologous chromosomes line up end-to-end so that when they divide, each daughter cell receives a sister chromatid from both members of the homologous pair. Biology for AP Courses 2022-06-09T00:00:00Z They decondense, expand, and replicate their DNA in preparation for mitosis. Anatomy and Physiology 2013-06-19T00:00:00Z In the asexual life cycle, 1n spores undergo mitosis to form long chains of cells called mycelia. Fundamentals of Biology 2015-01-01T00:00:00Z The replication of DNA occurs during the synthesis phase, or S phase, of the cell cycle, before the cell enters mitosis or meiosis. Concepts of Biology 2013-04-25T00:00:00Z First she will need to remember how mitosis works. D.C. program aims to curb need for remedial college math 2017-02-05T05:00:00Z The mechanics of meiosis II is similar to mitosis, except that each dividing cell has only one set of homologous chromosomes. Biology for AP Courses 2022-06-09T00:00:00Z Like Amazon Inspire, these sites let teachers search for materials by subject matter, like fractions or mitosis, and by grade level. Amazon Unveils Online Education Service for Teachers 2016-06-27T04:00:00Z In the gametangia, precursor cells give rise to gametes by mitosis. Fundamentals of Biology 2015-01-01T00:00:00Z The pollen tube grows from the pollen grain slowly, and the generative cell in the pollen grain divides into two sperm cells by mitosis. Concepts of Biology 2013-04-25T00:00:00Z Normally, honeybee eggs split during mitosis into four daughter cells with just one set of chromosomes. Scientists Find Genes That Let These Bees Reproduce Without Males 2016-06-09T04:00:00Z Therefore, each cell has half the number of sister chromatids to separate out as a diploid cell undergoing mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Now a similar process of mitosis is happening to Twitch. Twitch launches a new hub where users can watch artists as they work 2015-10-29T04:00:00Z In a single-celled organism such as Chlamydomonas, there is no mitosis after fertilization. Fundamentals of Biology 2015-01-01T00:00:00Z One of these is larger than the others and undergoes mitosis to form the female gametophyte or embryo sac. Concepts of Biology 2013-04-25T00:00:00Z Our list of the top scientists and healthcare entrepreneurs under thirty has become so successful that its undergone mitosis. 30 Under 30: Young Scientists Who Are Changing The World 2015-01-05T05:00:00Z In most plants and all animal species, it is typically diploid cells that undergo mitosis to form new diploid cells. Biology for AP Courses 2022-06-09T00:00:00Z This occurs in studying a specific cell type or function, like mitosis or glucose production. Pursue Natural Curiosity to Find the Right Premed Research Opportunity 2014-08-12T04:00:00Z Further mitosis of the microspore produces two nuclei: the generative nucleus, and the tube nucleus. Fundamentals of Biology 2015-01-01T00:00:00Z The nuclear division that forms haploid cells, which is called meiosis, is related to mitosis. Concepts of Biology 2013-04-25T00:00:00Z In order to maintain stability and normal segregation at mitosis, one centromere of a dicentric chromosome needs to be inactive. Constitutional and somatic rearrangement of chromosome 21 in acute lymphoblastic leukaemia 2014-04-04T22:52:26.172Z The main differences between mitosis and meiosis occur in meiosis I, which is a very different nuclear division than mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Instead, cells in these lower concentrations of drug proceed through mitosis without substantial delay and divide their chromosomes on multipolar spindles, resulting in chromosome missegregation and cell death. [Research Articles] Cytotoxicity of Paclitaxel in Breast Cancer Is due to Chromosome Missegregation on Multipolar Spindles 2014-03-26T19:25:11.015Z After fertilization of the egg, the diploid zygote is formed, which divides by mitosis to form the embryo. Fundamentals of Biology 2015-01-01T00:00:00Z As you have learned, mitosis is part of a cell reproduction cycle that results in identical daughter nuclei that are also genetically identical to the original parent nucleus. Concepts of Biology 2013-04-25T00:00:00Z In order to maintain stability and normal segregation at mitosis, one centromere of a dicentric chromosome needs to be inactive. Constitutional and somatic rearrangement of chromosome 21 in acute lymphoblastic leukaemia 2014-04-04T22:52:26.172Z Meiosis differs from mitosis in that the number of chromosomes is halved and genetic variation is reduced in meiosis, but not in mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Metaphase chromosomes are visible hallmarks of mitosis, yet our understanding of their structure and of the forces shaping them is rudimentary. [Report] A Cascade of Histone Modifications Induces Chromatin Condensation in Mitosis 2014-01-02T19:26:32.019Z The pollen grains undergo mitosis without cytokinesis, resulting in four mature pollen grains with two nuclei each. Fundamentals of Biology 2015-01-01T00:00:00Z In mitosis, both the parent and the daughter nuclei contain the same number of chromosome sets—diploid for most plants and animals. Concepts of Biology 2013-04-25T00:00:00Z In order to maintain stability and normal segregation at mitosis, one centromere of a dicentric chromosome needs to be inactive. Constitutional and somatic rearrangement of chromosome 21 in acute lymphoblastic leukaemia 2014-04-04T22:52:26.172Z Metaphase and telophase portions of meiosis and mitosis are the same. Biology for AP Courses 2022-06-09T00:00:00Z Karsenti was interested in mitosis — the process of cell division — particularly in the mitotic spindle, an intricate structure that forms during cell division to ensure that new cells inherit only one copy of each chromosome. Systems ecology: Biology on the high seas 2013-09-04T17:20:24.237Z What if, instead of dividing asexually through mitosis as an animal zygote does, the resulting zygote immediately underwent meiosis? Mosses Make Two Different Plants From the Same Genome, and a Single Gene Can Make the Difference 2013-05-12T19:45:00.233Z The protein coils are further coiled, and during mitosis and meiosis, the chromosomes become even more greatly coiled to facilitate their movement. Concepts of Biology 2013-04-25T00:00:00Z Therefore, metacestodes may be vulnerable to similar strategies as cancer; suppression of mitosis, induction of apoptosis and prevention of DNA replication. The genomes of four tapeworm species reveal adaptations to parasitism 2013-04-03T17:20:55.120Z Meiosis II and mitosis are also the same and have the same number of chromosomes. Biology for AP Courses 2022-06-09T00:00:00Z As already noted each kind of animal or plant has its own characteristic number and types of chromosomes when these appear for division by mitosis. Being Well-Born An Introduction to Eugenics 2012-05-22T15:16:53.140Z Spores are cells used for propagation that are formed asexually, by regular cell division, AKA mitosis. Ferns, Secret Ninja Ferns, and their Alluring Asexual Bits 2012-05-07T11:15:00.827Z There are, however, serious objections to the interpretation of mitosis as an adaptation to ensure this equal distribution of the chromatin. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z Nuclear multiplication is usually indirect, the mitosis being, as a 559 rule, more elaborate in the earlier than in the later divisions. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 5 "Greek Law" to "Ground-Squirrel" 2011-12-05T03:00:51.527Z Cloning of cells through mitosis is molecularly much less complex than meiosis, consumes less energy, and is less risky. Biology for AP Courses 2022-06-09T00:00:00Z Normal cells in the body grow through cell division, or mitosis, which is carefully regulated by genes. Magazine Preview: Do Cellphones Cause Brain Cancer? 2011-04-14T03:30:00Z According to one, a single “hit” by a pulse of ionizing radiation when the chromosomes are condensed for mitosis might lead to localized fragmentation. [Editors' Choice] Catastrophe in the Nucleus 2011-01-19T22:55:30.187Z This explanation is in harmony with the occurrence of typical mitosis in active tissue cells on the one hand, and of amitosis in the relatively quiescent primary germ cells on the other. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z The helmet is the first cancer therapy to use alternating polarities in electric fields as a way to disrupt the cell-division process known as mitosis. Helmet zapping brain tumors with electricity 2010-06-12T03:55:00Z Fibroblasts are motile, able to carry out mitosis, and can synthesize whichever connective tissue is needed. Biology for AP Courses 2022-06-09T00:00:00Z The mitosis was definitely decreasing the last time I checked you. The Star Lord As in all the beetles so far studied there is no rest stage between the two maturation divisions, but the late anaphase of the first mitosis passes over quickly into the second spindle. Studies in Spermatogenesis Part II Individuality of the Chromosomes.—The most striking feature in the behaviour of the chromatin in mitosis is its resolution, at each division, into a—for any particular species—constant number of chromosomes. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z The anaphase of the same mitosis is shown in figures 217 and 218; it is peculiar in that one chromosome always divides more slowly than the others, the two elements hanging together at one end. Studies in Spermatogenesis Part I The advantage of nucleated red blood cells is that these cells can undergo mitosis. Biology for AP Courses 2022-06-09T00:00:00Z The phenomena of cell division in well-developed cells with nuclei is termed mitosis. The Sexual Question A Scientific, psychological, hygienic and sociological study No male somatic cells were found in mitosis, but they would, if found, show the same conditions as in the spermatogonia. Studies in Spermatogenesis Part II For the chromosomes of the heterotype mitosis arise by the looping round, not opening out, of the bivalent chromosomes. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z Anaphase of first maturation mitosis, one centrosome divided. Studies in Spermatogenesis Part I In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis or meiosis plus fertilization. Biology for AP Courses 2022-06-09T00:00:00Z Only in one case did he find the figures of nuclear division somewhat more abundant, where there was one mitosis only to several hundreds of leucocytes. Histology of the Blood Normal and Pathological Figures 99 and 100 are equatorial plates of the first mitosis. Studies in Spermatogenesis Part II In the simplest form of reproduction, one cell cutting itself in two to make two new ones, known as mitosis, the change begins in the nucleus, or kernel. Preventable Diseases The centrosome which, although small, is conspicuous in each mitosis, is seen in figure 83 between the two parts of the spindle-remains, applied to the outside of the nuclear membrane. Studies in Spermatogenesis Part I In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis or meiosis plus fertilization. Biology for AP Courses 2022-06-09T00:00:00Z Thus Müller says that he generally must look through many thousands of white cells before meeting one mitosis. Histology of the Blood Normal and Pathological As in several of the forms studied, material was collected for examination of the somatic cells, but no favorable cases of mitosis were to be found. Studies in Spermatogenesis Part II In mitosis or ordinary cell division, these chromosomes split lengthwise, so that the new cells always have the same number as the original one. Taboo and Genetics A Study of the Biological, Sociological and Psychological Foundation of the Family As the chromatin begins to condense for the second mitosis, disintegration of the element x becomes apparent. Studies in Spermatogenesis Part I Some unicellular eukaryotic organisms undergo binary fission by mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Without mitosis, or formation of threads, the homogeneous nucleus divides into two halves. The Evolution of Man — Volume 1 An early anaphase of this mitosis is shown in figure 19; here the small chromosome is already divided. Studies in Spermatogenesis Part II Describe the essential components and results of mitosis and the activities that occur during interphase to prepare the cell for mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Diamond-shaped and contracted cross-shaped tetrads from metaphase of first maturation mitosis, showing linin connections. Studies in Spermatogenesis Part I These cells went through meiosis, an adaption of mitosis, which reduced the number of chromosomes in each reproductive cell by half, while increasing the number of cells through cell division. Biology for AP Courses 2022-06-09T00:00:00Z The intricate physiological processes which accompany this "mitosis" have been very closely studied of late years. The Evolution of Man — Volume 1 The odd chromosome is always so placed that its longitudinal split is at right angles to the axis of the spindle, as though it were to divide in this mitosis. Studies in Spermatogenesis Part II Although mitosis and meiosis are similar in many ways, they have different outcomes. Biology for AP Courses 2022-06-09T00:00:00Z Prophase of spermatogonial mitosis, showing two exceptionally large chromosomes of equal length. Studies in Spermatogenesis Part I In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis or meiosis plus fertilization. Biology for AP Courses 2022-06-09T00:00:00Z As in mitosis, external factors and internal signals regulate the meiotic cell cycle. Biology for AP Courses 2022-06-09T00:00:00Z Figures 259, a and b, are equatorial plates of the second mitosis with 11 and 12 chromosomes respectively. Studies in Spermatogenesis Part II In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis or meiosis plus fertilization. Biology for AP Courses 2022-06-09T00:00:00Z Prophase of first maturation mitosis, some of the chromosomes split longitudinally. Studies in Spermatogenesis Part I In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis or meiosis plus fertilization. Biology for AP Courses 2022-06-09T00:00:00Z Recall that, in mitosis, homologous chromosomes do not pair together. Biology for AP Courses 2022-06-09T00:00:00Z Meiosis and mitosis share similarities, but have distinct outcomes. Biology for AP Courses 2022-06-09T00:00:00Z In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis or meiosis plus fertilization. Biology for AP Courses 2022-06-09T00:00:00Z Before each spermatogonial division it divides as in figures 2 and 3, and the same is true for each maturation mitosis. Studies in Spermatogenesis Part I Both are the form of gametogenesis that takes place through mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Chromosomal crossover occurs during the mitotic process when chromosomes are linked together and recombination takes place, increasing the variance of genetic combinations in the haploid mitotic cells formed from mitosis. Biology for AP Courses 2022-06-09T00:00:00Z In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis or meiosis plus fertilization. Biology for AP Courses 2022-06-09T00:00:00Z The replication appears to occur continuously, however, many questions about control of replication rate and segregation during mitosis are yet unanswered. Biology for AP Courses 2022-06-09T00:00:00Z The only probable explanation, it seems to me, is imperfect mitosis. Studies in Spermatogenesis Part I A diploid oogonium forms a haploid oocyte by the process of mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Blocking glycolysis in RBCs interrupts the process of mitosis leading to nondisjunction. Biology for AP Courses 2022-06-09T00:00:00Z In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis or meiosis. Biology for AP Courses 2022-06-09T00:00:00Z Prior to mitosis, each chromosome is duplicated to ensure that daughter cells receive the full amount of hereditary material contributed by both parents. Biology for AP Courses 2022-06-09T00:00:00Z Following mitosis, the cell undergoes cytokinesis, the splitting of the parent cell into two daughter cells, complete with a full complement of genetic material. Biology for AP Courses 2022-06-09T00:00:00Z Cell division involves both mitosis, the division of the chromosomes, and cytokinesis, the division of the cytoplasm. Biology for AP Courses 2022-06-09T00:00:00Z Now, repeat step 2 but show the cell at metaphase during mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Finally, model the two daughter cells that will result from mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Cells in the growing tip of the root rapidly undergo mitosis, just as the whitefish blastula described in Figure 10.10. Biology for AP Courses 2022-06-09T00:00:00Z With increasing distance from the growing tip, the rate at which mitosis occurs slows until tissue is reached in which the initiation of the cell cycle is delayed. Biology for AP Courses 2022-06-09T00:00:00Z In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis or meiosis plus fertilization. Biology for AP Courses 2022-06-09T00:00:00Z Problem Statement: Given the events included in all of interphase and those that take place in each stage of mitosis, estimate the length of each stage based on a 24-hour cell cycle. Biology for AP Courses 2022-06-09T00:00:00Z In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis or meiosis plus fertilization. Biology for AP Courses 2022-06-09T00:00:00Z Without mutation, or changes in the DNA, the daughter cells produced by mitosis receive a set of genetic instructions that is identical to that of the parent cell. Biology for AP Courses 2022-06-09T00:00:00Z Although the processes of meiosis and mitosis share similarities, their end products are different. Biology for AP Courses 2022-06-09T00:00:00Z The two centrosomes will give rise to the mitotic spindle, the apparatus that orchestrates the movement of chromosomes during mitosis. Biology for AP Courses 2022-06-09T00:00:00Z In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis or meiosis plus fertilization. Biology for AP Courses 2022-06-09T00:00:00Z As you have learned, the nuclear division that forms haploid cells— meiosis—is closely related to mitosis. Biology for AP Courses 2022-06-09T00:00:00Z In mitosis, both the parent and the daughter nuclei are at the same ploidy level—diploid for most plants and animals. Biology for AP Courses 2022-06-09T00:00:00Z Meiosis employs many of the same mechanisms as mitosis. Biology for AP Courses 2022-06-09T00:00:00Z One treatment for gout is colchicine, a medication that inhibits mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Meiosis and mitosis share obvious cellular processes and it makes sense that meiosis evolved from mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Crossing over or mixing of chromosomes does not occur in meiosis whereas it is prevalent in mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Meiosis differs from mitosis in that the number of chromosomes is halved and genetic variation is introduced in meiosis, but not in mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Meiosis and mitosis are also the same, except for the number of chromosomes. Biology for AP Courses 2022-06-09T00:00:00Z Inhibition of mitosis results in decreased white blood count. Biology for AP Courses 2022-06-09T00:00:00Z Prophase and telophase portions of meiosis and mitosis are the same. Biology for AP Courses 2022-06-09T00:00:00Z Spores are haploid reproductive cells that can produce haploid organisms through mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Daughter cells are genetically identical to parent cells after mitosis. Biology for AP Courses 2022-06-09T00:00:00Z A loss of assorted carbohydrates would result in mitosis. Biology for AP Courses 2022-06-09T00:00:00Z As you scan, you will notice that most of the cells are not undergoing mitosis but are in the interphase period of the cell cycle. Biology for AP Courses 2022-06-09T00:00:00Z In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis or meiosis plus fertilization. Biology for AP Courses 2022-06-09T00:00:00Z The main difference is in the type of cell produced: mitosis produces identical cells, allowing growth or repair of tissues; meiosis generates reproductive cells, or gametes. Biology for AP Courses 2022-06-09T00:00:00Z Figure 11.7 Meiosis and mitosis are both preceded by one round of DNA replication; however, meiosis includes two nuclear divisions. Biology for AP Courses 2022-06-09T00:00:00Z The daughter cells resulting from mitosis are diploid and identical to the parent cell. Biology for AP Courses 2022-06-09T00:00:00Z In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis or meiosis plus fertilization. Biology for AP Courses 2022-06-09T00:00:00Z The difficulty lies in the clear differences between meiosis I and mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Which of the following events occurs in both mitosis and meiosis I? Biology for AP Courses 2022-06-09T00:00:00Z Organisms reproducing through mitosis produce genetically different daughter cells whereas those producing through meiosis have genetically identical daughter cells. Biology for AP Courses 2022-06-09T00:00:00Z Organisms producing through mitosis create genetically identical offspring as only a single parent copies its entire genetic material to the offspring. Biology for AP Courses 2022-06-09T00:00:00Z The condensing complex compacts chromosomes, and the resulting condensed structure is necessary for chromosomal segregation during mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Identifying the haploid and diploid stages within the life cycles of different organisms is vital in understanding how organisms reproduce and in determining when mitosis and meiosis occur. Biology for AP Courses 2022-06-09T00:00:00Z Germ cells are capable of mitosis to perpetuate the cell line and meiosis to produce gametes. Biology for AP Courses 2022-06-09T00:00:00Z The zygote will undergo multiple rounds of mitosis to produce a multicellular offspring. Biology for AP Courses 2022-06-09T00:00:00Z The haploid cells that make up the tissues of the dominant multicellular stage are formed by mitosis. Biology for AP Courses 2022-06-09T00:00:00Z Therefore, mitosis is not necessary in bacterial cell division. Biology for AP Courses 2022-06-09T00:00:00Z The zygote will undergo many rounds of mitosis and give rise to a diploid multicellular plant called a sporophyte. Biology for AP Courses 2022-06-09T00:00:00Z |
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