Concept 32 Some DNA can jump.

Barbara McClintock as a Cornell coed, 1923.

Barbara McClintock as a graduate student at Cornell, 1929. (L-R standing) Charles Burnham, Marcus Rhoades, Rollins Emerson, and Barbara McClintock. George Beadle is kneeling by the dog.

Barbara McClintock at Cold Spring Harbor Laboratory, 1951.

Barbara McClintock and Harriet Creighton at a meeting at Cold Spring Harbor Laboratory.

Barbara McClintock working in the cornfield at Cold Spring Harbor Laboratory.

Barbara McClintock on a collection trip to Chapingo, Mexico in 1959.

Barbara McClintock teaching a 1981 plant genetics course at Cold Spring Harbor Laboratory.

Barbara McClintock at the opening of the McClintock building at Cold Spring Harbor Laboratory.

Barbara McClintock at the Nobel ceremonies, 1983.

Barbara McClintock with David Micklos, director of the DNA Learning Center at Cold Spring Harbor, 1988. Some of McClintock's artifacts were used in an exhibit at the DNA Learning Center.

Barbara McClintock did not have a phone in her apartment on the Cold Spring Harbor Laboratory grounds. She learned that she won the 1983 Nobel Prize from an announcement on the radio.

How does a transposon choose its insertion site? Can an organism control the frequency and location of transposition?

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Barbara McClintock as a Cornell coed, 1923.