What is true about any two normal gametes from a human female parent?
a) their chromosomes are exactly the same.
b) they can combine to form a new organism.
c) each has a diploid number of chromosomes.
d) they have the same number of chromosomes.

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.