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
Antes se pensaba que esos cromosomas determinantes del sexo dibujados aquí, XY si eres hombre, XX si eres mujer, simplemente determinaban si nacería con ovarios o los testículos, y era las hormonas sexuales que producen esos órganos eran las responsables de las diferencias