Nettie Stevens
American geneticist
Nettie Maria Stevens 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... Wikipedia
Born: July 7, 1861, Cavendish, VT
Died: May 4, 1912 (age 50 years), Baltimore, MD
Education: Bryn Mawr College (1903), Stanford University (1899–1900), Stanford University (1896–1899), and more
Known for: XY sex-determination system
Parents: Julia Stevens and Ephraim Stevens
Siblings: Emma Stevens