試題詳解

55. The Dunkers are a religious group that moved from Germany to Pennsylvania in the mid-1700s. They do not marry with members outside their own immediate community. Today, the Dunkers are genetically unique and differ in gene frequencies, at many loci, from all other populations including those in their original homeland. Which of the following mechanisms likely explains the genetic uniqueness of this population?
(A) mutation and natural selection
(B) founder effect and genetic drift
(C) disassortative mating and divergent selection
(D) population bottleneck and Hardy-Weinberg equilibrium
(E) heterozygote advantage and stabilizing selection