Its a Genetic thing, in which the albino child has received the Dominant albino trait and the sibling has not.
A specises that is very close to extinction that they are trying to save
Men have testicles, and a scrotum. Women have ovaries, uterus and a vagina. Also women have wider pelvises than men so that they can have children.
Nondisjunction , I'm think this is the answer but I'm not for sure.