It used to be thought that those sex-determining chromosomes pictured here -- XY if you're male, XX if you're female -- merely determined whether you would be born with ovaries or testes, and it was the sex hormones that those organs produced that were responsible for the differences we see in the opposite sex.
Vanasti arvati, et need sugu määravad  kromosoomid siin pildil - XY meestel ja XX naistel - määravad vaid selle, kas inimene sünnib munasarjade või munanditega, ja nendest organiste poolt toodetud suguhormoonid tingivad soolised erinevused.