After a coastal storm 3 deer mice (Peromyscus), huddled on a tree trunk, are carried many miles out to sea and wash ashore on a small island that has no mice, but does have habitat to support them. Two of the mice are female, and both mate with the only male.
A. bottleneck effect.
B. founder effect.
C. mutation.
D. genetic drift.
E. selection pressure.
Answer: B
Although it was a rare trait in the mainland population, one of the original female mice is homozygous for very large ears. This will lead to a population with a higher incidence of big ears than the mainland population because of
A. bottleneck effect.
B. founder effect.
C. mutation.
D. genetic drift.
E. selection pressure.
Answer: B