A child who has inherited sickle-cell disease alleles from both parents does not exhibit the symptoms of a homozygote.What could account for this outcome?

Question

Quizplus · Accepted Answer

One possible explanation for a child with inherited sickle-cell disease alleles from both parents not exhibiting the symptoms of a homozygote is that one of the alleles has undergone a reversion. This means that the mutation in one of the alleles has been corrected, resulting in a functional protein being produced. This would mitigate the effects of the mutated allele and lead to a milder phenotype.

A Child Who Has Inherited Sickle-Cell Disease Alleles from Both