| 单词 | pea plant |
| 例句 | The true-bred pea plants, he noted, possessed distinct traits that were hereditary and variant. The Gene 2016-06-02T00:00:00Z A breeze ran through the courtyard, fluttering the leaves of the young pea plants and blowing cool across my cheek where Madam struck me. Chains 2008-01-01T00:00:00Z He crossed two pea plants that had different properties and observed the seven traits in the subsequent generations for two years. Pulses are packed with goodness 2023-02-23T05:00:00Z It contributed to the understanding of genetics, thanks to Gregor Mendel's famous experiment with pea plants. Pulses are packed with goodness 2023-02-23T05:00:00Z In the late 19th century a monk, Gregor Mendel, established, through experiments on pea plants, the basic rules of inherited traits. Breaking the code 2015-08-06T04:00:00Z It was here that Gregor Mendel, an Augustinian friar, began experiments with pea plants to see how biological traits are passed on from parents to offspring. Mix and match 2016-05-26T04:00:00Z Q: Something is notching the edge of the leaves of my pea plant, giving them a scalloped appearance. Q&A: Help with aphids and pea leaf weevils 2014-05-13T04:00:00Z So Mendel switched — auspiciously, historically — to pea plants. Review: Siddhartha Mukherjee’s ‘The Gene,’ a Molecular Pursuit of the Self 2016-05-08T04:00:00Z Mendel observed the way that different physical properties of the pea plants were inherited: pod shape, seed shape, seed color, unripe pod color, flower color, stem length and flower placement. Pulses are packed with goodness 2023-02-23T05:00:00Z His name was Gregor Mendel — and he loved breeding pea plants. Gregor Mendel, father of genetics, couldn't get anyone to listen to him — but he got the last laugh 2023-06-06T04:00:00Z This was an important check to make sure that the two varieties of pea plants only differed with respect to one trait, flower color. Concepts of Biology 2013-04-25T00:00:00Z In a way, domestication involves artificially driving the evolution of an organism. 19th century geneticist Gregor Mendel famously demonstrated this with pea plants. Did humans domesticate plants, or did they domesticate us? 2022-09-11T04:00:00Z In 1865, Mendel presented the results of his experiments with nearly 30,000 pea plants to the local Natural History Society. Biology for AP Courses 2022-06-09T00:00:00Z Cassandra is a botanist who is studying the growth of pea plants under a variety of conditions. College Algebra with Corequisite Support 2020-09-23T00:00:00Z As he explained when he presented his historic paper "Experiments in Plant Hybridization" in 1865, Mendel had spent nine years testing 28,000 plants, most of them pea plants. Gregor Mendel, father of genetics, couldn't get anyone to listen to him — but he got the last laugh 2023-06-06T04:00:00Z The seven characteristics that Mendel evaluated in his pea plants were each expressed as one of two versions, or traits. Concepts of Biology 2013-04-25T00:00:00Z Mendel had stocks of pea plants with different specific characteristics, or traits. Miller & Levine Biology 2018-01-01T00:00:00Z By experimenting with true-breeding pea plants, Mendel avoided the appearance of unexpected traits in offspring that might occur if the plants were not true breeding. Biology for AP Courses 2022-06-09T00:00:00Z For instance, when he crossed tall and dwarf pure-breeding pea plants, all of the offspring were tall. Anatomy and Physiology 2013-06-19T00:00:00Z To test this, they placed froghoppers and a length of pea plant in airtight acrylic chambers to measure how much carbon dioxide the insect produced after 30 minutes of slurping sap. This Insect Drinks Your Milkshake 2021-07-13T04:00:00Z In 1865, Mendel presented the results of his experiments with nearly 30,000 pea plants to the local natural history society. Concepts of Biology 2013-04-25T00:00:00Z For the gene for pea plant height, one allele produced tall plants and another allele produced short plants. Miller & Levine Biology 2018-01-01T00:00:00Z To prevent the pea plant that was receiving pollen from self-fertilizing and confounding his results, Mendel painstakingly removed all of the anthers from the plant’s flowers before they had a chance to mature. Biology for AP Courses 2022-06-09T00:00:00Z Mendel performed thousands of crosses in pea plants with differing traits for a variety of characteristics. Anatomy and Physiology 2013-06-19T00:00:00Z The pea plant was grown hydroponically, bare roots dangling into a solution of nutrients. This Insect Drinks Your Milkshake 2021-07-13T04:00:00Z For example, the phenotypes that Mendel observed in his crosses between pea plants with differing traits are connected to the diploid genotypes of the plants in the P, F1, and F2 generations. Concepts of Biology 2013-04-25T00:00:00Z The following principles of heredity apply to many organisms, not just pea plants. Miller & Levine Biology 2018-01-01T00:00:00Z Mendel’s parental pea plants always bred true because both of the gametes produced carried the same trait. Biology for AP Courses 2022-06-09T00:00:00Z Mendel’s observation of pea plants also included many crosses that involved multiple traits, which prompted him to formulate the principle of independent assortment. Anatomy and Physiology 2013-06-19T00:00:00Z Williams adds immediacy to the tale of pea plants and heredity by starting with an encounter between Mendel and C. W. Eichling, whose story was new to me. The forgotten scientists who paved the way to the double helix 2019-04-15T04:00:00Z Mendel studied traits with only one mode of inheritance in pea plants. Concepts of Biology 2013-04-25T00:00:00Z The vines on any type of pea plant are edible, but according to most connoisseurs, the shoots on sugar-snap varieties are the most delicious. Sow these seeds now, and you could be eating fresh homegrown salads by October 2018-08-15T04:00:00Z The probability of having only round pea plants from a random sample of 3 progeny will be 1 . Biology for AP Courses 2022-06-09T00:00:00Z Secondly, Mendel performed his studies using thousands of pea plants. Anatomy and Physiology 2013-06-19T00:00:00Z The runaway favourite is generally Gregor Mendel, who, in the mid-nineteenth century, crossbred pea plants to discover the basic rules of heredity. How asylums became the crucible of genetics 2018-06-04T04:00:00Z Working with garden pea plants, Mendel found that crosses between parents that differed for one trait produced F1 offspring that all expressed one parent’s traits. Concepts of Biology 2013-04-25T00:00:00Z Gregor Mendel discovered fundamental rules of genetics by raising pea plants. What’s Behind Many Mystery Ailments? Genetic Mutations, Study Finds 2018-03-15T04:00:00Z Background: Consider that pea plants mature in one growing season, and you have access to a large garden in which you can cultivate thousands of pea plants. Biology for AP Courses 2022-06-09T00:00:00Z Working with pea plants, Mendel discovered that the factors that account for different traits in parents are discretely transmitted to offspring in pairs, one from each parent. Anatomy and Physiology 2013-06-19T00:00:00Z The basic idea of gene drive seems counterintuitive to anyone raised on the notion of Gregor Mendel’s pea plants and the random inheritance of genes from parents. Could Genetic Engineering Save the Galápagos? 2017-11-01T04:00:00Z How brainless pea plants evaluate risk is still unclear, but Dr. Shemesh thinks they must be following simple rules, not reasoning. Lacking Brains, Plants Can Still Make Good Judgments About Risks 2016-06-30T04:00:00Z As he removed nylon cords from his pea plants, he draped them over a side of the walker. Friends combine for nearly a century of garden work 2015-10-17T04:00:00Z Figure 12.19 This figure shows all possible combinations of offspring resulting from a dihybrid cross of pea plants that are heterozygous for the tall/dwarf and inflated/constricted alleles. Biology for AP Courses 2022-06-09T00:00:00Z Applied to pea plants, that means that the alleles associated with the different traits of the plant, such as color, height, or seed type, will sort independently of one another. Anatomy and Physiology 2013-06-19T00:00:00Z The proposal is a chance to change the conversation about GM organisms, says geneticist Hans-Jörg Jacobsen, who helped develop pea plants resistant to several fungi. In unusual move, German scientists lobby for GM labeling 2015-05-18T04:00:00Z They pulled up a pea plant and saw that the roots were covered in nodules. Plan to Ease World Hunger Wins at Google Science Fair 2014-11-21T05:00:00Z Thanks to root nodules containing such bacteria, bean and pea plants and their cousins are able to obtain nitrogen from the atmosphere. Connecting The Microcosmos and The Macro World 2014-11-04T05:00:00Z For best results, this is repeated with hundreds or even thousands of pea plants. Biology for AP Courses 2022-06-09T00:00:00Z This is the same 3:1 dominant:recessive ratio that Mendel observed in his pea plants would apply here. Anatomy and Physiology 2013-06-19T00:00:00Z In Me, Myself, and Why, Ouellette takes her readers from Gregor Mendel's pea plants to the personal genome-sequencing services of the 21st century. Book Review: Me, Myself, and Why 2014-02-12T12:00:00Z A chance observation about warts on a pea plant led a group of teenagers on a three-year mission to ease the world food crisis using agricultural science. Plan to Ease World Hunger Wins at Google Science Fair 2014-11-21T05:00:00Z For example, Mendel took pea plants that were homozygous for different traits and crossbred them. Follow Family Traits with an Easy Tree 2013-06-13T14:45:03.027Z Try to imagine growing that many pea plants, and consider the potential for experimental error. Biology for AP Courses 2022-06-09T00:00:00Z With almost absolute regularity this proportion was maintained in every case of crossing of pairs of characters, quite opposed to one another, in his pea plants. Catholic Churchmen in Science Hop-gardens or vineyards, or the slender rows of sticks that carry pea plants and beans in rustic gardens, make the same play with light, and let it through as fine a design. London Impressions Etchings and Pictures in Photogravure The little pea plant couldn't live without it. Uncle Robert's Geography (Uncle Robert's Visit, V.3) Marsilea grows everywhere on the flats; and a fine little pea plant with a solitary red blossom, was found amongst the basaltic rocks round the water-hole. Journal of an Overland Expedition in Australia : from Moreton Bay to Port Essington, a distance of upwards of 3000 miles, during the years 1844-1845 An example of population variation would be Mendel’s pea plants that were homozygous dominant, heterozygous and homozygous recessive for various traits. Biology for AP Courses 2022-06-09T00:00:00Z An example of a genetic event is a round seed produced by a pea plant. Biology for AP Courses 2022-06-09T00:00:00Z Figure 12.4 In the P generation, pea plants that are true-breeding for the dominant yellow phenotype are crossed with plants with the recessive green phenotype. Biology for AP Courses 2022-06-09T00:00:00Z The data set is too small to predict the genotype of the round pea plant. Biology for AP Courses 2022-06-09T00:00:00Z The data set is too small to predict the genotype of the round pea plant. Biology for AP Courses 2022-06-09T00:00:00Z In addition, Mendel confirmed that, other than flower color, the pea plants were physically identical. Biology for AP Courses 2022-06-09T00:00:00Z Flower position in pea plants is determined by a gene with axial and terminal alleles. Biology for AP Courses 2022-06-09T00:00:00Z The large quantities of pea plants that Mendel examined allowed him calculate the probabilities of the traits appearing in his F2 generation. Biology for AP Courses 2022-06-09T00:00:00Z Since Mendel’s experiments with pea plants, other researchers have found that the law of dominance does not always hold true. Biology for AP Courses 2022-06-09T00:00:00Z |
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