Respuestas al mensaje #1,999

Sorry, can't edit my last post, that was taken away from me in the past. I think you missed something important here. In the case of individuals...

Chromosomes aren't technically the determining factor, but the presence or absence of the SRY gene that is normally on the Y chromosome and...

No quite how this works It's the case with Caster and she seems to gain a surplus of T in her system, added masculinization and athletic abilities...