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

Nettie Stevens discovered XY intercourse chromosomes. She did not get credit because she had two X’s. During the change of this 20th century, biologist Nettie Stevens ended up being driven to resolve a clinical secret which had perplexed mankind for millennia. The secret ended up being therefore easy but daunting: Why do males become boys […]