The Pennsylvania Amish have a very high frequency of an unusual allele that results in short arms and legs and extra fingers. This high frequency is thought to be the result of
A) the founder effect.
B) the addition of new members to an already established population.
C) nonrandom mutations.
D) coevolution.
E) a population bottleneck.

Question

Quizplus · Accepted Answer

The high frequency of an unusual allele in the Pennsylvania Amish population is attributed to the founder effect, which occurs when a new population is established by a very small number of individuals from a larger population. This can lead to the prevalence of genetic traits that were rare in the original population.

The Pennsylvania Amish Have a Very High Frequency of an Unusual