Although the prevalence of the sickle-cell anemia gene is higher in West Africa than in the United States, __________ prevent cells from sickeling, so fewer Africans than African Americans suffer from the disease.

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West African agricultural crops, particularly those that contain high levels of certain nutrients, can help prevent the sickling of cells, reducing the incidence of sickle-cell anemia symptoms.

Although the Prevalence of the Sickle-Cell Anemia Gene Is Higher