Californian sea otter populations likely have an excess of heterozygotes because their populations were heavily harvested in the 1930s until very small in number. A trait that provides a greater level of fitness compared to those lacking it is called an adaptation. In a hypothetical population with two alleles (A and a) where 20 individuals are homozygous for a, 20 homozygous for A, and 60 heterozygous, the frequency of the A allele is 0.50. Genetic drift within a founding population would most likely lead to homogenization of allelic frequencies that differ from the original population.

1. 25. It is hypothesized that Californian populations of Sea Otters: a. have excess of homozygotes,
because there is selection against the heterozygous animals. b. have excess of heterozygotes,
because populations were harvested until they were very small in the 1930s. c. have excess of
heterozygotes, because homozygous individuals are easier to catch and turn into fur coats. d.
have excess of homozygotes, because of migration of animals from Alaska. e. have excess of
homozygotes, because populations were harvested until they were very small in the 1930 s. 26. A
trait that confers a greater level of fitness, relative to those who lack it, is called a(n) (a.)
adaptation -b. mutation c. variation d. allele e. None of the above. 27. A hypothetical population
has two alleles for a gene: A and a. In a random sample of 100 individuals, 20 are homozygous
for a,20 are homozygous for A, and 60 are heterozygous. What is the frequency of A ? a. 0.20 b.
0.25 (c) 0.50 d. 0.60 e. 0.80 28. Suppose a founding population has an allelic frequency not
typical of the original population. Which of the following effects would most likely lead to
homogenization? a. genetic drift within the founding population b) random mating within the
founding population c. no mutations within either population d. migration between the original
and founding populations e. None of the above.