Archive for the ‘how much is a russian bride’ Category

Nettie Stevens discovered XY intercourse chromosomes. She did not get credit because she had two X’s.

Share this tale

Share All sharing choices for: Nettie Stevens discovered XY intercourse chromosomes. She don’t get credit because she had two X’s.

In the change associated with the century that is 20th biologist Nettie Stevens had been driven to resolve a medical secret which had perplexed mankind for millennia.