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Why does sickle cell anemia remain more prevalent in Sub-Saharan Africa than in the rest of the world? A. The prevalence of malaria in Sub-Saharan Africa provided a selective advantage to individuals who were heterozygous. B. People of African ancestry are genetically predisposed to carry the sickle cell allele. C. Infection with malaria provides a selective disadvantage to individuals who are heterozygous for the sickle cell allele. D. Reduced access to medical facilities predisposes Sub-Saharan Africans to an increased chance of disease.
Sagot :
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