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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.
Apr 30, 2024 · sex chromosome. sex determination. 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.
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18 hours ago · Information about Nettie's early years and family is sparse. She was born on July 7, 1861. We know she descended from ancestors who made their way to Boston from England centuries prior, arriving in 1635. And that her parents married in 1854. She was the third of their four children. In 1863, Nettie's mother died. Shortly after, Nettie's father remarried.
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.
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 ...
She was born in Cavendish, Vermont. Her family settled in Westford, Vermont. Stevens' father was a carpenter and handyman. He did well enough to own quite a bit of Westford property, and could afford to send his children to school. Stevens was a brilliant student, consistently scoring the highest in her classes.
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 ...
