By J. Heather Cullen
ISBN-10: 0791072487
ISBN-13: 9780791072486
ISBN-10: 1438124082
ISBN-13: 9781438124087
Offers the lifestyles and occupation of the geneticist who in 1983 used to be offered the Nobel Prize for her learn of maize cells.
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Extra info for Barbara McClintock: Geneticist (Women in Science)
Example text
Once McClintock had determined the correct number of chromosomes in maize, she turned her attention to determing which genes were contained in each of those chromosomes. This was a far more daunting task. Early in her research, she developed “a feeling for the organism” that allowed her to see the smallest microscopic Early Work at Cornell: 1918 –1927 changes, unseen by others before her. (Keller, xiv) These microscopic differences in the cell revealed themselves as differences in the adult ear of corn.
H. Morgan, found that he could induce mutations, permanent changes in the genetic material, in fruit flies. Muller’s mutant fruit flies came in all shapes and sizes—big eyes, no eyes, hairy bodies, bald bodies, and short- and long-lived flies. From a theoretical standpoint, Muller’s work demonstrated that physical agents could alter genes—which implied that genes had a definite normal structure that could be changed. ) Lewis Stadler, one of the premier maize geneticists in the country, also became interested in the effects that X-rays had on genes at about the same time that Muller was doing his Nobel Prize–winning experiments.
I just couldn’t stand that kind of discrimination. (Keller, 33) When the soldiers returned from Europe after the end of World War I, they brought with them a new attitude toward life. They rejected the social conventions of their parents. The especially severe horrors of trench warfare and the general loss of faith in progress made these young men desperate 41 42 BARBARA MCCLINTOCK Cornell University in the Roaring Twenties, when McClintock was a student there. The 1920s was a period of dramatic change in society, as the soldiers who had returned from World War I were less inclined to follow the strict morality of their parents.
Barbara McClintock: Geneticist (Women in Science) by J. Heather Cullen
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