Herbert Jennings, US geneticist

Herbert Jennings, US geneticist

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Credit: NATIONAL LIBRARY OF MEDICINE/SCIENCE PHOTO LIBRARY

Caption: Herbert Spencer Jennings (1868-1947), US geneticist, with a microscope. Jennings studied at the University of Michigan, then obtained his doctorate at Harvard (1896). He was Professor of Zoology and Director of the Zoological Laboratory at Johns Hopkins University from 1910 to 1938. Through the study of the Paramecium protozoan, he studied the mathematics of genetics. Between 1912 and 1917 he published formulae that described the results of successive cycles of breeding. His work was summarised in 'Genetics of the Protozoa' (1929). He wrote on the subject of eugenics, including 'The Biological Basis of Human Nature' (1930).

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