Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Plural form of
polyploid .
Etymologies
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Examples
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Bananas are sterile and seedless because they are odd polyploids in which one set of chromosomes A or B has no homologous set to pair up with during synapsis of meiosis.
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Bananas are sterile and seedless because they are odd polyploids in which one set of chromosomes A or B has no homologous set to pair up with during synapsis of meiosis.
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Polyploidy is a very common means of plants to produce new species–in fact, most domesticated food plants like wheat and rye are polyploids–but is comparitively rare among animals.
ACSI v. Stearns, aka Wendell Bird vs. UC - The Panda's Thumb
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A.report on this phase was given at a recent meeting of the N.N.G.A. Therefore such excellent nut producing species as the pecan are naturally doubled types, called polyploids.
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Nobody could seriously argue that polyploids are genuine speciation events.
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So unless you want to obscure the issue or lie by arguing that animals that choose to do it with certain others are speciated or that polyploids are genuine examples of new species forming then the stark truth, as I wrote, is this: there has never yet been an observed instance of a new species forming.
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There are a few rare cases in which there have been polyploids found in select insects, fishes, amphibians, and reptiles.
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There are a few rare cases in which there have been polyploids found in select insects, fishes, amphibians, and reptiles.
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When we see instances of bananas with 22 and 33 chromosomes, instead of 11, we know that they are 2n, and 3n, polyploids.
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Wheat is specially well-suited for TILLING due to the high mutation densities tolerated by polyploids, which allow for very efficient screens.
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