Sickle cell anemia is a debilitating genetic disease that often results in death during childhood. The allele that causes sickle cell anemia is more common than one might expect among Africans (about 1 in 10 individuals have the allele). Why is this harmful allele so common in this population?

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    Sickle cell anemia can be treated with medicines that prolong the life of carriers.
    Sickle cell anemia is not expressed in carriers.
    Sickle cell anemia is caused by a dominant allele.
    Carriers of sickle cell anemia have some resistance to malaria, a common disease in Africa.
asked May 19, 2013 in Biology by anonymous
    

1 Answer

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Carriers of sickle cell anemia have some resistance to malaria, a common disease in Africa.
answered May 20, 2013 by Bioshare ~Top Expert~ (34,070 points)

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