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Nettie Stevens. Nettie Maria Stevens (July 7, 1861 – May 4, 1912) [1] was an American geneticist who discovered sex chromosomes. In 1905, soon after the rediscovery of Mendel 's paper on genetics in 1900, she observed that male mealworms produced two kinds of sperm, one with a large chromosome and one with a small chromosome. When the sperm ...
Apr 30, 2024 · Nettie Stevens (born July 7, 1861, Cavendish, Vermont, U.S.—died May 4, 1912, Baltimore, Maryland) was an American biologist and geneticist who was one of the first scientists to find that sex is determined by a particular configuration of chromosomes. Stevens’s early life is somewhat obscure, although it is known that she taught school and ...
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Nettie Marie Stevens is shown here looking through a microscope while studying at the Stazione Zoologica in Naples, Italy, in 1909. In 1904, soon after getting her Ph.D. in biology, Stevens was awarded a grant from Carnegie Science. Her 1905 paper “Studies in Spermatogenesis with Especial Reference to the Accessory Chromosome” produced some ...
Jun 20, 2010 · Stevens was born in Cavendish, Vermont, on 7 July 1861 to Julia Adams and Ephraim Stevens. In 1870 her father, by then widowed and remarried, moved to Westford, Vermont, with his new wife and four children to take up a job with the Townhouse Building Committee. In Westford, Nettie performed well in public school, achieving perfect attendance ...
Nettie Maria Stevens was born on July 7, 1861, in Cavendish, Vermont, to Julia and Ephraim Stevens. After the death of her mother, her father remarried and the family moved to Westford, Massachusetts. She was graduated from Westford Academy in 1880. Stevens taught high school and was a librarian. Her teaching duties included courses in ...
Oct 5, 2021 · Overlooked during her lifetime, Dr. Stevens’s impact stands the test of time. When Nettie Maria Stevens, MA, PhD died of breast cancer in 1912, she was eulogized by future Nobelist, Thomas Hunt Morgan, in the Science journal. Her passing also was noted by the New York Times. Two years prior, she had been named among the 1,000 leading American ...
Nov 17, 2020 · Today, Stevens’ name is being re-discovered, over a hundred years after her death. In 1994, Stevens was added to the National Women’s Hall of Fame, and on the 155th anniversary of her birthday in 2016 was recognized with a Google Doodle, which directed internet searches to learn more about her own scientific discoveries. In time, perhaps ...
