| 单词 | polyploidy |
| 例句 | The paper explains that the avocado experienced two "polyploidy" events in its history, in which the avocado’s entire genome got copied, but these duplicated genes were deleted. Hass Avocados have been genetically sequenced, but is that a good thing? 2019-08-07T04:00:00Z But it’s now clear, Losick says, that polyploidy “is widespread in the fruit fly and I think in our body as well.” Cells with extra genomes may help tissues respond to injuries—and species survive cataclysms 2023-08-23T04:00:00Z Scientists have identified two main types of polyploidy that can lead to reproductive isolation of an individual in the polyploid state. Concepts of Biology 2013-04-25T00:00:00Z The first quirk in the strawberry genome is something scientists call polyploidy, meaning multiple sets of chromosomes in its cells. Strawberries Have 8 Sets of Chromosomes to Thank for Their Survival 2023-05-04T04:00:00Z One widely held explanation for large genomes is called polyploidy, or whole genome duplication. Cracking the Case of the Giant Fern Genome 2022-09-12T04:00:00Z The other form of polyploidy occurs when individuals of two different species reproduce to form a viable offspring called an allopolyploid. Biology for AP Courses 2022-06-09T00:00:00Z The research effort has revealed several genes that naturally help drive polyploidy, evidence that it is not just a cellular accident. Cells with extra genomes may help tissues respond to injuries—and species survive cataclysms 2023-08-23T04:00:00Z Although polyploidy occurs occasionally in animals, most chromosomal abnormalities in animals are lethal; it takes place most commonly in plants. Concepts of Biology 2013-04-25T00:00:00Z As the researchers note, their findings fit a hypothesis that polyploidy allows plants to be both a “jack of all trades” and a “master of some.” Strawberries Have 8 Sets of Chromosomes to Thank for Their Survival 2023-05-04T04:00:00Z It’s a solitary case, but it seems to bolster the idea that polyploidy provided the plant with an evolutionary leg up. Cracking the Case of the Giant Fern Genome 2022-09-12T04:00:00Z Although polyploidy occurs occasionally in animals, it takes place most commonly in plants. Biology for AP Courses 2022-06-09T00:00:00Z Once its damage control work is done, polyploidy has to shut down because the accumulation of these supersize cells can be harmful. Cells with extra genomes may help tissues respond to injuries—and species survive cataclysms 2023-08-23T04:00:00Z In contrast, polyploidy is very common in the plant kingdom, and polyploid plants tend to be larger and more robust than euploids of their species. Concepts of Biology 2013-04-25T00:00:00Z The evolutionary significance of polyploidy extends far beyond strawberry. Strawberries Have 8 Sets of Chromosomes to Thank for Their Survival 2023-05-04T04:00:00Z Finally, this year, it happened — and the sequences showed no evidence of polyploidy. Cracking the Case of the Giant Fern Genome 2022-09-12T04:00:00Z Scientists have discovered more than half of all plant species studied relate back to a species evolved through polyploidy. Biology for AP Courses 2022-06-09T00:00:00Z It also turns out to stimulate polyploidy in insect wound healing, and to curb the process when its activity falls. Cells with extra genomes may help tissues respond to injuries—and species survive cataclysms 2023-08-23T04:00:00Z Scientists have discovered more than 1/2 of all plant species studied relate back to a species evolved through polyploidy. Concepts of Biology 2013-04-25T00:00:00Z Genes maintained in duplicate despite hundreds of millions of years of evolution are critical in the development of these traits, providing strong evidence that polyploidy led to the evolution of these novel traits. Strawberries Have 8 Sets of Chromosomes to Thank for Their Survival 2023-05-04T04:00:00Z For Dr. Soltis, the sequencing offered closure for the longstanding hypothesis of fern polyploidy. Cracking the Case of the Giant Fern Genome 2022-09-12T04:00:00Z With such a high rate of polyploidy in plants, some scientists hypothesize that this mechanism takes place more as an adaptation than as an error. Biology for AP Courses 2022-06-09T00:00:00Z Several biotech companies are developing drugs that target the YAP1 pathway for other purposes, and they might also help defend against the downsides of polyploidy. Cells with extra genomes may help tissues respond to injuries—and species survive cataclysms 2023-08-23T04:00:00Z Sympatric speciation may also take place in ways other than polyploidy. Concepts of Biology 2013-04-25T00:00:00Z Some mutations, such as polyploidy in plants, benefit the organism. Miller & Levine Biology 2018-01-01T00:00:00Z The organisation of Ebola virus reveals a capacity for extensive, modular polyploidy. Structure and assembly of the Ebola virus nucleocapsid 2017-11-07T05:00:00Z In the example shown, a normal gamete from one species fuses with a polyploidy gamete from another. Biology for AP Courses 2022-06-09T00:00:00Z Today they comprise some 16,000 species, suggesting the polyploidy has helped more than hurt. Cells with extra genomes may help tissues respond to injuries—and species survive cataclysms 2023-08-23T04:00:00Z Sympatric speciation can occur through errors in meiosis that form gametes with extra chromosomes, called polyploidy. Concepts of Biology 2013-04-25T00:00:00Z The condition in which an organism has extra sets of chromosomes is called polyploidy. Miller & Levine Biology 2018-01-01T00:00:00Z It is a process known as genome duplication or polyploidy. Scientists discover a new flower of Shetland - BBC News 2017-08-15T04:00:00Z In contrast, polyploidy resulting in even chromosome numbers is very common in the plant kingdom. Biology for AP Courses 2022-06-09T00:00:00Z They induce polyploidy in some individuals by exposing them to a chemical that interrupts cell division. Cells with extra genomes may help tissues respond to injuries—and species survive cataclysms 2023-08-23T04:00:00Z They were able to identify or confirm two dozen examples of polyploidy in these species. Double or quits 2014-06-26T04:00:00Z And in the liver, polyploidy might spur regeneration by creating genetic diversity among cells. [News Focus] Strength in Numbers? 2014-02-13T19:25:16.169Z The doubling of the genome to create polyploidy is common among land plants, and most major flowering plant lineages exhibit some history of genome duplication. [Report] Polyploids Exhibit Higher Potassium Uptake and Salinity Tolerance in Arabidopsis 2013-08-09T19:26:56.957Z In both domains, genetic material is transferred horizontally, and polyploidy is common. Biology for AP Courses 2022-06-09T00:00:00Z That could be another beneficial consequence of polyploidy. Cells with extra genomes may help tissues respond to injuries—and species survive cataclysms 2023-08-23T04:00:00Z A few hundred cases of polyploidy are known in insects, reptiles, amphibians, crustaceans, fish, and other “lower” animals. For Plants, Polyploidy Is Not a Four-Letter Word 2013-05-19T23:45:00.497Z The Gossypium genus is ideal for investigating emergent consequences of polyploidy. Repeated polyploidization of Gossypium genomes and the evolution of spinnable cotton fibres 2012-12-19T18:21:26.970Z Rice, for example, is a diploid plant today, but its genetic sequence still bears the fingerprints of polyploidy—traces of other genomes. A Rose is a Rose, Until it Isn't: Five Reasons Plant DNA is Totally Crazy 2012-05-03T23:15:00.703Z Scientists have identified two main types of polyploidy that can lead to reproductive isolation of an individual in the polyploidy state. Biology for AP Courses 2022-06-09T00:00:00Z By mutating genes that control polyploidy in the mustardlike plant Arabidopsis thaliana, she and her team discovered that if the sepal had too few polyploid cells, it was stiff and upright and blooming was impeded. Cells with extra genomes may help tissues respond to injuries—and species survive cataclysms 2023-08-23T04:00:00Z But on the whole, polyploidy is a dicey and often dangerous affair for animals. For Plants, Polyploidy Is Not a Four-Letter Word 2013-05-19T23:45:00.497Z At all sorts of spatial and temporal scales, polyploidy is a “damage response,” suggests Douglas Soltis, a plant evolutionary biologist at the University of Florida. Cells with extra genomes may help tissues respond to injuries—and species survive cataclysms 2023-08-23T04:00:00Z The condition, known as polyploidy, can change cells’ appearance and give them new properties and sometimes leads to new species. Cells with extra genomes may help tissues respond to injuries—and species survive cataclysms 2023-08-23T04:00:00Z This is particularly true in mammals and birds, where more than two copies — a condition termed polyploidy — produces something euphemistically termed “general developmental disruption”. For Plants, Polyploidy Is Not a Four-Letter Word 2013-05-19T23:45:00.497Z More recent work has unearthed a key molecular signal driving polyploidy in sepals. Cells with extra genomes may help tissues respond to injuries—and species survive cataclysms 2023-08-23T04:00:00Z For in plants, unlike animals, polyploidy is common, seemingly innocuous, and often acted upon by natural selection as an instrument of speciation. For Plants, Polyploidy Is Not a Four-Letter Word 2013-05-19T23:45:00.497Z |
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