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By experimenting on germ cells, Stevens interpreted her data to conclude that chromosomes have a role in sex determination during development. Stevens was not even recognized immediately after her discovery. No one was credited with that discovery or a number of others, so her omission in his textbook need not be due to sexism. Stevens returned to the US to continue her studies in cytology at Bryn Mawr. Before he read her papers, he had believed that environmental factors played a role in sex determination. Her record of 38 publications includes several major contributions which further the emerging concepts of chromosomal heredity. At first glance this omission seems unfair, but he left out credit for many researchers as well, including Alfred Sturtevant who discovered linkage in Morgan's own laboratory as an undergraduate student. Education[ edit ] During her education, Stevens was near the top of her class. Morgan said she confirmed McClung's hypothesis about sex chromosomes [15] when she actually refuted his main claim that the larger X chromosome determined sex. As a result of her research, Stevens provided critical evidence for Mendelian and chromosomal theories of inheritance. However, in his textbook, The Mechanism of Genetics, published in , he didn't credit either Stevens or Wilson with the discovery of sex chromosomes. She deduced that the chromosomal basis of sex depended on the smaller Y chromosome carried by the male. Her major sex determination work was published by the Carnegie Institution of Washington in the two part monograph, "Studies in Spermatogenesis ," [6] which highlighted her increasingly promising focus of sex-determination studies and chromosomal inheritance. After receiving the grant, she used germ cells of aphids to examine possible variation in chromosome sets between the two sexes. Morgan's recognition came in part from his work on sex linkage of the white mutant gene of fruit flies and was especially heightened by his Nobel Prize award in Most of her research was completed at Bryn Mawr College. Maria ford fuck

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