N. M. (Nettie Maria) Stevens
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 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.
Studies in Spermatogenesis (Part 1 of 2)
"Studies in Spermatogenesis (Part 1 of 2)" by N. M. Stevens is a scientific publication written in the early 20th century. The book focuses on the pro...
By N. M. (Nettie Maria) Stevens
Studies in Spermatogenesis (Part 2 of 2)
"Studies in Spermatogenesis (Part 2 of 2)" by N. M. Stevens is a scientific publication written in the early 20th century, specifically in 1906. This ...
By N. M. (Nettie Maria) Stevens