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.
Nekoć se smatralo da ti kromosomi koji određuju spol i koji su prikazani ovdje - XY za muškarca, XX za ženu - samo određuju hoćete li se roditi s jajnicima ili s testisima, a spolni hormoni koje su ti organi proizvodili odgovorni su za razlike koje vidimo na suprotnom spolu.