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How a Population Bottleneck Reshapes Allele Frequencies

Bottlenecks are the second demographic mechanism that moves frequencies without any selection, and they are also the mechanism behind longer LD blocks, which the trans-ancestry argument later depends on.

Questions this Concept answers

Why does a bottleneck change allele frequencies even when no selection acts on the trait?

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Genetic Drift and Allele Frequency Change in Population Genetics

Genetic drift is a random, chance-driven change in allele frequencies within a population, contrasted with natural selection, where the surviving organisms are not necessarily better adapted but simp…