Theodosius Dobzhansky, Russian geneticist

Theodosius Dobzhansky, Russian geneticist

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Credit: AMERICAN PHILOSOPHICAL SOCIETY/SCIENCE PHOTO LIBRARY

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Caption: Theodosius Dobzhansky (1900-1975), Russian-American geneticist. Dobzhansky linked Darwin's evolution theory with Mendel's laws of hereditary. He studied the genes of the fruit fly, Drosophila sp, and found a greater variability than expected. He found a high proportion of flies had debilitating genes which were masked by the presence of a dominant 'normal' gene. He showed that the presence of a masked debilitating gene was advantageous as it allowed a population to be more versatile in adapting to a changing environment. Dobzhansky wrote many influential books, including Genetics and the Origin of Species (1937). Photographed in 1966.

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Keywords: 1960s, 1966, 20th century, adult, american, author genetics and the origin of species, caucasian, darwin, darwinism, dominance, drosophila, evolution, evolutionary theory, flies, fruit fly, gene, genes, genetic, geneticist, genetics, head and shoulder, hereditary, historical, history, human, looking at camera, male, man, mendel, one person, outdoors, outside, people, portrait, russian, scientist, surname d, theodosius dobzhansky, us

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