The Old Order Amish in Lancaster County Is Descended from One

question 53

Multiple Choice

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

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