births
Nettie Stevens, American geneticist (died 1912)
Related Wikipedia articles
Nettie Stevens
American geneticist (1861–1912)
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.…Source: Wikipedia (CC BY-SA)
July 7
Day of the year
July 7 is the 188th day of the year in the Gregorian calendar; 177 days remain until the end of the year.Source: Wikipedia (CC BY-SA)