Essays on Nettie Stevens

Nettie Stevens Nettie Stevens Nettie Maria Stevens was born in 1861 in Cavendish,Vermont. She was an American life scientist and geneticist, whose research proved that chromosomes determine the sex of an organism. She completed in only two years the four-year course at Westfield usual School in Massachusetts. Nettie graduated with the highest academic scores in her class. She recieved her B.A. in 1899 and her M.A. in 1900 at Stanford. Nettie studied Tenebrio molitor beetles and found that unimpregnated eggs in female beetles always contain an X chromosome.

Sperm from male beetles contain either an X chromosome or a Y chromosome. She found that eggs fertilized by spermatozoonatozoon carrying the X chromosome produce female beetles. The combination of egg and Y-chromosome sperm produce male beetles. Edmund Beecher Wilson, a biologist from Columbia University in New York City, made this same discovery at astir(predicate) the same time as Nettie. Nettie also e...If you want to sound a full essay, order it on our website: Orderessay

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