In a living organism, at which stage does segregation of gene pairs takes place? a (a)ovulation (b)gamete (c)formation (d)fertilization

5) these are organisms where the genetic material is not bound by a nucleus. they are usually unicellular.

Color blindness is a recessive trait. the gene for color blindness is on the x chromosome. the family tree below shows the trait of color blindness. the only unknown is the mother in the first generation

How does natural selection change thephenotypes within a population over time?