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Barbara McClintock

The Columbia Encyclopedia, Sixth Edition | Date: 2008

Barbara McClintock 1902-92, American geneticist. She discovered that certain genetic material, "transposable elements" or "jumping genes" (now called transposons), shifted its location in the chromosomes from generation to generation. At first ignored, her research was later recognized as a major contribution to DNA research. In 1983 she was awarded the Nobel Prize in Physiology or Medicine.

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