english: 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.
non_english: Včasih so mislili, da spolni kromosomi na sliki, XY za moške, XX za ženske, določajo le, ali se bo človek rodil z jajčniki ali testisi. Spolni hormoni, ki jih ta organa izdelujeta, pa naj bi bili odgovorni za ostale razlike med spoloma.