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Some autosomal recessive diseases have a high prevalence in largepopulations, even though they are often fatal (e.g., sickle cell disease inAfricans, cystic fibrosis in Europeans). Which of the following is the most likelyexplanation for this phenomenon? (10.0分)A.InbreedingB.High mutation rates in specific populationsC.Survival advantage in heterozygous carriersD.Survival advantage in individuals who are normal homozygotes
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