1861 - 1912
Nettie Stevens American Biologist
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Nettie Stevens is a member of the following lists: Deaths from breast cancer, Bryn Mawr College alumni and 1861 births.
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Details
| First Name |
Nettie
|
| Last Name |
Stevens
|
| Birthday |
7th July, 1861
|
| Birthplace |
Cavendish, Vermont
|
| Died |
4th May, 1912
|
| Place of Death |
Baltimore, Maryland, United States
|
| Zodiac Sign |
Cancer
|
| Nationality |
American
|
| Occupation |
Biologist
|
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. When the sperm with the large chromosome fertilized eggs, they produced female offspring, and when the sperm with the small chromosome fertilized eggs, they produced male offspring. The pair of sex chromosomes that she studied later became known as the X and Y chromosomes.
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