A student states that every living thing settles sex with X and Y chromosomes in the way humans do. Why is that statement wrong?
Because the human arrangement is one system among several that living things use✓Bonne réponse
Because sex is never determined by chromosomes in living things other than humans
Because species differ in chromosome number, so no other species can have a sex chromosome pair
Because every species has its own system, so no two species share one
Explication
Generalising from one species to all living things is the error: the arrangement described for humans is real, but it is not the only way sex is settled among living things. Swinging to the opposite claim, that chromosomes never take part outside humans, replaces one overstatement with another.