Homozygotes with two sickle-cell alleles are selected against because of mortality. However, heterozygotes for sickle-cell allele experience little effects of sickle allele and are more likely to survive malaria. The net effect of this exposure produced evolutionary change in areas where malaria is endemic by .
causing sickle-cell allele
distortion of red blood cells
increasing sickle-cell allele frequency
increasing the number of infected mosquitoes
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Homozygotes with two sickle-cell alleles are selected against because of mortality. However, heteroz...
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