McClintock Barbara


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Mc·Clin·tock

 (mə-klĭn′tək, -tŏk′), Barbara 1902-1992.
American geneticist. She won a 1983 Nobel Prize for discovering that genes in plant cells can change position both within and between chromosomes.

Mc·Clin·tock

(mə-klĭn′tək), Barbara 1902-1992.
American geneticist who proved that genes can change position on chromosomes. By studying the chromosomes found in corn, McClintock discovered that the genes for specific traits, such as kernel color, did not remain in the same place on the chromosomes. Other scientists did not accept her discoveries right away. She spent decades completing more research before her work, which overturned one of Gregor Mendel's main theories about heredity, was finally recognized.