Calvin Bridges, US geneticist

Calvin Bridges, US geneticist

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Credit: AMERICAN PHILOSOPHICAL SOCIETY/SCIENCE PHOTO LIBRARY

Caption: Calvin Blackman Bridges (1889-1938), US geneticist. Bridges worked on sex-linked traits in the fruit fly (Drosophila melanogaster), producing results that suggested that chromosomes contained units of heredity (genes). Photographed at the Marine Biological Laboratory, Woods Hole, Massachusetts, USA.

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