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Home Q & A Board Biology-Related Homework Help General Biology
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tyressjones tyressjones
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7 years ago
What is the reason for the prevalence of the sickle-cell allele in African populations?
A)  African populations tend to be at higher altitudes, and sickled cells better bind oxygen in these environments.
B)  Sickled cells help prevent vitamin A deficiency among African populations.
C)  Sickled cells are better able to clot blood.
D)  Heterozygotes have some resistance to the parasite that causes malaria.
Textbook 
Biology: Life on Earth

Biology: Life on Earth


Edition: 10th
Authors:
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skeledentskeledent
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tyressjones Author
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6 years ago
Face with Open Mouth How can I every repay you!
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