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Title: What is the reason for the prevalence of the sickle-cell allele in African populations? Post by: tyressjones on Apr 23, 2017 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. Title: Re: What is the reason for the prevalence of the sickle-cell allele in African populations? Post by: skeledent on Apr 23, 2017 Content hidden
Title: Re: What is the reason for the prevalence of the sickle-cell allele in African populations? Post by: tyressjones on Jun 21, 2017 :o How can I every repay you!
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