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What is the reason for the prevalence of the sickle-cell allele in African populations?

tyressjones

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What is the reason for the prevalence of the sickle-cell allele in African populations?

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.

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Biology: Life on Earth

Biology: Life on Earth

Edition: 10^th

Authors: Audesirk, Byers

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