Nettie Stevens | Wikipedia audio article
Channel: wikipedia tts
Date: 2018-12-04

This is an audio version of the Wikipedia Article:
Nettie Stevens


00:00:49 1 Early life
00:01:45 2 Education
00:05:10 3 Career
00:10:40 4 Sex Discrimination
00:11:47 5 Death
00:12:18 6 Quotes
00:12:58 7 Legacy
00:13:45 8 See also



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SUMMARY
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Nettie Maria Stevens (July 7, 1861 – May 4, 1912) was an early American geneticist. She discovered sex chromosomes at the same time as Edmund Beecher Wilson. In 1905, soon after the rediscovery of Mendel's paper on genetics in 1900, she discovered 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. She and Wilson both credited her with the discovery of sex chromosomes, but later scientists disagreed about who made the discovery. The pair of sex chromosomes that she studied later became known as the X and Y chromosomes.