Morgan, Thomas Hunt (1866–1945)
American biologist who, through his experiments with the fruit fly Drosophila,
established the relation between genes and
chromosomes and thus the mechanism of
heredity. For his work he received the
1933 Nobel Prize in Physiology or Medicine. His discovery of the function
of chromosomes is related in his book The Theory of the Gene (1926,
rev. ed. 1928).