Apopulation has a small size, high level of genetic drift, and very little migration into the population. what will most likely happen to the genetic diversity in the population over time? a. genetic diversity will remain unchanged because genetic drift does not have much of an impact on small populations. b. genetic diversity will remain unchanged because high levels of genetic drift offset low levels of gene flow. c. genetic diversity will increase because the existing alleles will mutate into new alleles. d. genetic diversity will decrease becaus