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Thomas Hunt Morgan (1866—1945) American zoologist




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Theodosius Dobzhansky


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Russian-born US geneticist who was a key figure in the development of population genetics. His long-term studies of natural populations of the fruit fly Drosophila in New Mexico revealed the high frequencies of potentially harmful alleles that are generally concealed by normal ‘wild-type’ alleles, but which can confer selective advantage under certain environmental conditions. His many books include Genetics and the Origin of Species (1937), a seminal work in the synthesis of genetics and evolutionary biology.

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