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Nettie Stevens Nettie Maria Stevens was born in 1861 in CavendishVermont She was an American biologist 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 Normal School in Massachusetts Nettie graduated with the highest academic scores in her class She recieved her BA in 1899 and her MA in 1900 at Stanford Nettie studied Tenebrio molitor beetles and found that unfertilized 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 sperm 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 about the same time as Nettie Nettie also established that chromosomes exist as paired structures in body cells Nettie Stevens was not credited very well for her discovery Instead someone else was given the credit even though Nettie had done all of the work Nettie gained notoriety after her death in 1912 from Thomas Hunt Morgan He stated Modern cytological work involves an intricacy of detail the significance of which can be appreciated by the specialist alone but Miss Stevens had a shre in a discovery of importance and her name will be remembered for this when the minutiae of detailed investigations that she carried out have become incorporated in the general body of the subject Netties name didnt become famous and not much credit was given to her for her discoveries but she was given some credit for what she established I think that Nettie Stevens is a brilliant woman She made a very important discovery which effects even our lives today Her contribution to the world expanded our knowledge of the human body
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