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.
こちらは これらの性を決定する 染色体の写真ですが 男性であればXY 女性ならXXで― それは単に卵巣か精巣のどちらを持って 産まれるかを決めるだけもので これらの器官が作る性ホルモンが 男女の差を生じさせるものだと 考えられてきました