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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. In the change associated with century that is 20th biologist Nettie Stevens had been driven to fix a medical secret which had perplexed mankind for millennia. The secret had been therefore easy but daunting: Why do males become boys… Read more »