shifting Balance

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Sewall Wright (1889—1988)

genetic drift

R. A. Fisher (1890—1962) statistician and geneticist

genetic polymorphism


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A theory, proposed by Sewell Wright, that maintains that biological evolution proceeds most rapidly when subpopulations of a species remain isolated for a time sufficient to acquire distinctive adaptations, followed by reestablishment of gene flow, the broadening of genetic diversity, and the enhancement of evolutionary flexibility. See Chronology, Wright.

Subjects: Genetics and Genomics — Evolutionary Biology.

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