Barbara McClintock

Barbara McClintock works at her microscope bench in the Carnegie Institution's genetics department at Cold Spring Harbor, New York, a fine instrument in one hand and small glass dishes in front of her. The photograph was handed out in 1947, when she received the American Association of University Women's Achievement Award for her work on cytogenetics. Under that microscope she was studying maize chromosomes, the work that showed some genes can move from place to place, and it brought her the Nobel Prize in 1983.