The 155th Birthday of Nettie Stevens, the Female Geneticist Who Discovered Sex Determination, is Trending

Nettie Stevens is credited with pioneering sex determination which she put its responsibility on males. The discovery remained a paradigm shift from the former ways of looking at human chromosomes.

In recognition of this ground breaking achievement of all ages, Google launched a Doodle showing the genius peering through a microscope at the XY chromosomes.

Stevens may not be a household name, but her contributions remain pivotal to the scientific community. Nattie Stevens found that male sperm carry XY chromosomes while the female egss carry Y chromosomes. In her study on Mealworms, she concluded that fertilization is only possible with male sperm.