Variation: Quick Facts

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Oct. 26, 2026

News •

Study defines average human genome and normal genetic disease risk • Oct. 22, 2026, 3:45 PM ET (News-Medical)

Gene variants that can cause sudden death mapped • Oct. 20, 2026, 2:20 PM ET (Medical Xpress)

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Topics

mutation continuous variation antigenic variation discontinuous variation Bergmann’s Rule antigenic shift antigenic drift polymorphism Pleomorphism phase polymorphism adaptation extinction coevolution Speciation emergence natural selection selection mosaic evolution Creative evolution parallel evolution

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evolution: Genetic variation in populations

Key People

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Richard B. Goldschmidt

German-born American zoologist

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Herbert Spencer Jennings

American zoologist