How many possible combinations of both of your parents chromosomes were there to make you?

Which of the following occurs most often in a population when genetic variation and overproduction are present? some organisms have a lower reproductive success than others. some organisms have a higher reproductive success than others. some organisms have no reproductive success. some organisms do not have genetic variation.

This is a type pf behavior that animals are born with and them to survive

Which geologic feature would most likely be represented by contour lines john far apart from one another? a cliff a hill a plain a valley