The Old Order Amish in Lancaster County is descended from one man and woman and has an unusually high frequency of a recessive allele that causes Ellis-van Creveld syndrome. This is an example of ____.
A) a bottleneck
B) mutation
C) a founder effect
D) gene flow
E) genetic drift

Question

Quizplus · Accepted Answer

The Old Order Amish in Lancaster County's high frequency of a recessive allele causing Ellis-van Creveld syndrome is an example of a founder effect, where a small group of individuals establishes a population with a genetic makeup that differs from the original population, leading to the prevalence of certain genetic traits.

The Old Order Amish in Lancaster County Is Descended from One