| 单词 | sex cell |
| 例句 | During a sonogram the obstetrician points out the sex cells of the narrator’s future grandchildren. New Fiction From Olen Steinhauer, J. G. Ballard and Others 2012-03-28T22:20:12Z In human reproduction, two kinds of sex cells or gametes are involved. Fundamentals of Biology 2015-01-01T00:00:00Z Human cells that contain one set of 23 chromosomes are called gametes, or sex cells; these eggs and sperm are designated n, or haploid. Concepts of Biology 2013-04-25T00:00:00Z After all, prokaryotes are but single cells exposed directly to their environment, whereas the sex cells of multicellular organisms are usually sequestered in protected parts of the body. Biology for AP Courses 2022-06-09T00:00:00Z The purpose, or ergon, of both the acorn and the oak tree are present in the zygote, the cell that forms when male and female sex cells combine. Introduction to Philosophy 2022-06-15T00:00:00Z Unique for its role in human reproduction, a gamete is a specialized sex cell carrying 23 chromosomes—one half the number in body cells. Anatomy and Physiology 2013-06-19T00:00:00Z These germ cells then migrate to the chicken’s gonads and become sex cells. In a conservation first, a cloned ferret could help save her species 2022-01-13T05:00:00Z The cancer originates in germ cells, which are sex cells that do not leave the brain when the fetus is in utero, according to Nicklaus Children’s Hospital. Teen’s brain tumors allegedly misdiagnosed as ‘anorexia’ 2019-06-24T04:00:00Z Human cells that contain one set of chromosomes are called gametes, or sex cells; these are eggs and sperm, and are designated 1n, or haploid. Biology for AP Courses 2022-06-09T00:00:00Z Doctors can freeze sperm from adult male patients, but boys do not start producing mature sex cells until they reach puberty. First Baby Monkey Born Using Sperm from Frozen Testicles 2019-03-21T04:00:00Z They've harvested sex cells from the living rhinos and have made steps toward in vitro fertilization with southern white rhino surrogates. Survival of Northern White Rhino Hinges on Last Sick Male 2018-03-02T05:00:00Z One of them had a mutation in a sex cell — whether it was an egg or sperm, the scientists can’t tell. This Mutant Crayfish Clones Itself, and It’s Taking Over Europe 2018-02-05T05:00:00Z Last year the first steps towards making sex cells out of body cells were detailed in Nature, a science journal. The business of sperm banks 2017-09-14T04:00:00Z Gametes, often called sex cells, unite with other sex cells to produce new, unique organisms. Biology for AP Courses 2022-06-09T00:00:00Z But it's not an easy journey - there are lots of hurdles to overcome for the male sex cells, which are just 0.065mm in length. Swimming technique of sperm 'all down to simple maths' - BBC News 2017-03-19T04:00:00Z A lucky diver waiting for the annual event might see a coral head laden with individual sex cells that look visibly swollen and ripe for release. For Coral, Mass Spawns Are the Way to Go 2016-06-20T04:00:00Z But the mutant crayfish sex cell had two. This Mutant Crayfish Clones Itself, and It’s Taking Over Europe 2018-02-05T05:00:00Z The prehistoric sex cells belong to a class of earthworms and leeches called Clitellata, and date from 50 million years ago, in the early Eocene period when the first horses, rhinos and sheep emerged. Fossilised sperm found in Antarctica is world's oldest, say scientists 2015-07-14T04:00:00Z During meiosis II—which is more similar to a mitotic division—the chromatids separate and segregate into four haploid sex cells. Biology for AP Courses 2022-06-09T00:00:00Z Some of this trend may be due to alterations that occur in sex cell DNA that are then passed on through affected sperm but more studies need to firm up that relationship. How Lab Rats Are Changing Our View of Obesity 2015-03-05T05:00:00Z If corals shed their sex cells just minutes out of sync with neighbors, the odds of reproductive success are greatly reduced. For Coral, Mass Spawns Are the Way to Go 2016-06-20T04:00:00Z Somehow the two sex cells fused and produced a female crayfish embryo with three copies of each chromosome instead of the normal two. This Mutant Crayfish Clones Itself, and It’s Taking Over Europe 2018-02-05T05:00:00Z Scientists created the early sex cells by culturing human embryonic stem cells for five days in controlled conditions. Scientists Create Artificial Sperm and Eggs 2014-12-24T05:00:00Z Here are five of the strangest male sex cells in the animal kingdom. The 6 most bizarre types of sperm found in nature 2014-05-16T04:00:00Z The male sex cell was found in the fossilized remains of freshwater crustaceans, known as ostracods. 17-million-year-old giant sperm discovered — and it was preserved in a very strange way 2014-05-14T04:00:00Z Spawning ends with both animals thrusting to release sex cells that fuse and develop in the nest. Bizarre 'vampires' heat up for sex 2013-06-27T08:48:20Z Normal sex cells contain a single copy of each chromosome. This Mutant Crayfish Clones Itself, and It’s Taking Over Europe 2018-02-05T05:00:00Z Warming waters signal the coral that it's time to start producing sex cells, then a precise combination of daylight and moonlight trigger the sudden, simultaneous release of eggs and sperm. Injured Coral Have Less 'Sex' 2012-12-26T22:15:03.467Z Nicotine is not only affecting lung cells, but also affecting sex cells in ways that cause the lungs which ultimately develop from those cells to express their genes in the same abnormal ways. Epigenetics and health: Grandma’s curse 2012-11-01T16:03:12Z Sequencing for fertility—and more The ability to sequence these single sex cells will open a new window to study infertility. Sequencing of Single Sperm Could Reveal New Infertility Causes 2012-07-19T17:45:00.217Z “The basic finding is that new mutations present in sex cells carry substantial risk for autism,” says Dr. Matthew State, a professor of psychiatry at Yale, who led one of the studies. Autism: Genetic Studies Show Risk for Older Fathers 2012-04-05T21:36:21Z Embryo development required sex cell fusion, cell movement, cell interaction and programmed cell death. Did Sex Emerge from Cannibalism? Sex, Death and Kefir, by Lynn Margulis (1938–2011) 2011-11-23T20:15:04.617Z Howlett, F. S. Effect of carbohydrate deficiency upon formation of sex cells in tomato. The Tomato 2011-11-20T03:00:13.470Z The resulting glowing prairie voles were evidence that the embryos had indeed been altered, and that the alteration had been transmitted to every cell in the vole’s body, including its sex cells. 2009-12-30T10:39:00Z For disease and fatigue affect sex cells unfavorably. The Good Housekeeping Marriage Book From the moment conception takes place—the very instant when the two sex cells meet and blend—then and there "the gates of heredity are forever closed." The Mother and Her Child An increased or decreased representation of it in the reproductive sex cells in the gonads. The Glands Regulating Personality We may briefly discuss the question of the transmission through the sex cells of such instincts as are based upon heliotropism. Darwin and Modern Science But scattered through the substance of the gland, between these lymphocytes, like the interstitial cells of the sex glands placed between the sex cells, are peculiarly staining cells in whorls. The Glands Regulating Personality The hastening of sexual hair by tumors of the adrenal gland may also be put down to a release from restraint of the interstitial sex cells. The Glands Regulating Personality While this division of the united sex cells is progressing, a wonderful change is also taking place in the inside lining of the uterus. The Mother and Her Child Besides its action upon the sex cells and the brain cells, the internal secretion of the adrenal cortex acts upon the pigment cells of the skin, blunting their sensitiveness to light. The Glands Regulating Personality In turn the pituitary would become stabilized in the direction of increased secretion, and hand on the component of increased secretion to the sex cells. The Glands Regulating Personality Man has his critical age of sex cell deterioration as well as woman. The Glands Regulating Personality The pituitary and the adrenal cortex are mutually assistant, alike in their influence upon the tone of the brain and sex cells. The Glands Regulating Personality This union of the male and female sex cells is called "fertilization." The Mother and Her Child |
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