Which of the following describes in Oranism that we different alleles for a trait

Explain why in any given geographical region, women tend to have lighter skins( by 3-4% on average) than men?

Which statement about inheritance is true? o girls get most of their traits from their moms, boys get most of their traits from their dads. o male offspring will always have an x-linked genetic disease if the mom is a carrier o fathers always determine the gender of the offspring in humans. o males never have y chromosomes.

What must be true for natural selection to heppen