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:

Question

Quizplus · Accepted Answer

The high frequency of the unusual allele in the Pennsylvania Amish population is likely due to the founder effect, which occurs when a small group of individuals becomes isolated from a larger population and establishes a new population with a different gene pool. The Amish community in Pennsylvania descends from a small group of founders who were relatively isolated from other populations, making the founder effect a plausible explanation for the high frequency of the unusual allele in the population.

The Pennsylvania Amish Have a Very High Frequency of an Unusual