Genetic disorders such as Tay-Sachs disease,Bloom syndrome,Gaucher disease and Canavan disease are more common in Ashkenazi Jewish populations because
A) spontaneous mutations occur more frequently in this group.
B) the gene pool has been highly variable over thousands of years.
C) microevolution has not influenced this culture.
D) their history includes several population bottlenecks.
E) genetic screening programs identify carriers.
Correct Answer:
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