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Two Chromosomes which have the same structure and the same sequence of genes
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- In central Africa, the frequency (percentage) of the sickle-cell allele, compared to the wild-type allele, has remained stable over the years because the sickle-cell gene protects against malaria. In the United States, malaria was eradicated shortly before World War II by eliminating the mosquito that spreads the disease. What has likely happened to the frequency of the sickle-cell gene in African Americans living in the United States since the elimination of malaria?