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Home Q & A Board Biology-Related Homework Help Cell Biology
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colleen colleen
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12 years ago
In Central Africa, the frequency of the sickle-cell allele has remained stable over the years because the allele protects against malaria. In the United States, malaria was eradicated by eliminating the mosquito that spreads the disease. The decreasing frequency of the sickle-cell allele in African Americans since malaria was eliminated in the United States is an example of:
A) directional selection.
B) stabilizing selection.
C) disruptive selection.
D) genetic drift.
E) the founder effect.
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duddyduddy
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12 years ago
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colleen Author
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#2
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12 years ago
Thank you Duddy Smiling Face with Open Mouth
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