Search results
People also ask
Why was Nettie Stevens important?
Who was Nettie Maria Stevens?
What did Nettie Maria Stevens discover?
How old was Nettie Maria Stevens when she died?
Nettie Maria Stevens (July 7, 1861 – May 4, 1912) 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.
Stevens conducted research and taught at Bryn Mawr and Cold Spring Harbor until she died of breast cancer in 1912, just nine years after completing her doctorate. During her short but significant career, Stevens published a remarkable 40 papers on such topics as chromosomes, regeneration, and taxonomy.
Nettie Maria Stevens (July 7, 1861 – May 4, 1912) was an early American geneticist. She discovered sex chromosomes. Stevens saw two kinds of sperms in male mealworms. One had a large chromosome and one had a small chromosome. They were sex chromosomes, which later became known as the X and Y chromosomes. Stevens eventually became fully qualified.
Jun 20, 2010 · People Heredity Reproduction Biography. Stevens, N. M. (Nettie Maria), 1861-1912. Multiple theories about what determines sex were tested at the turn of the twentieth century. By experimenting on germ cells, cytologist Nettie Maria Stevens collected evidence to support the connection between heredity and the sex of offspring.
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 ...
Nov 17, 2020 · In 1905, Steven published her findings, which definitively made the case for biological sex as the makeup of X and Y chromosomes. The discovery effectively made her one of the first scientists in the world to understand how chromosomes may be involved in sex determination. Stevens at the Naples Zoological Station in 1909.
Mar 19, 2015 · Mar 19, 2015. Nettie Stevens. Image from Wikipedia. People understood the difference between male and female before Nettie Stevens, but it was because of her work in genetics that we understand how that difference comes about. Born in 1861, Nettie was an exceptionally bright student, and, after teaching for a few years, received her BA and MA ...
