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n malarial regions of Nigeria, two morphs of red blood cells are encoded by two alleles, A = normal and S = sickle cells, with relative fitnesses of the three genotypes in the population given below. This is an example ofA.) Stabilizing selectionB.) Directional selectionC.) Disruptive selectionD.) Frequency-dependent balancing selectionE.) Heterozygote advantage balancing selection
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