Download Barbara McClintock: Geneticist (Women in Science) by J. Heather Cullen PDF

By J. Heather Cullen

Provides the lifestyles and occupation of the geneticist who in 1983 used to be offered the Nobel Prize for her examine of maize cells.

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She went after every ball—she put maximal effort into every play. Harriet Creighton later told a story about McClintock at this time. One June, they had a project going together. The corn plants they were growing stood only about a foot high when a “once-in-a-century” torrential rain struck Ithaca. It lasted for hours, all night long. Creighton had to get up at 3:00 in the morning to help her mother evacuate her house because a nearby creek had risen above its banks. After all her mother was safe, Creighton drove her car to the fields where the geneticists grew their corn.

McClintock looked forward to being a tourist in Germany, where she would meet and work with some of the most famous scientists in the world. DISAPPOINTMENT IN GERMANY In 1933, McClintock was awarded the Guggenheim fellowship that took her to Germany. Morgan, Emerson, and Stadler recommended McClintock for this prestigious award, and she greatly appreciated the opportunity, but her time in Germany 59 60 BARBARA MCCLINTOCK Curt Stern was a prominent geneticist in Germany; he studied Drosophila, or fruit flies, instead of maize.

These toxic elements are called teratogens. A miscarriage during pregnancy may be nature’s way of ensuring that a baby whose mutations are too extensive for its survival is not born. Choosing a Career: 1927–1941 ways. Life would try to express its variations through these chance changes in chromosomes. Because chromosomes were expressed in pairs, many of these abnormal chromosomes would never be expressed; but every once in a while, the viability of an offspring would depend on the new chromosomes.

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