Figure 15.1 shows the three alleles of the beta-globin gene. Which one of the following genotypes is heterozygous?

Question

Figure 15.1 shows the three alleles of the beta-globin gene.  Which one of the following genotypes is heterozygous?

Quizplus · Accepted Answer

The genotype AS represents a heterozygous individual with one normal allele (A) and one sickle cell allele (S). AA represents a homozygous individual with two normal alleles, SS represents a homozygous individual with two sickle cell alleles, and CC represents a homozygous individual with two alleles for beta-thalassemia. None of the answer options represents a heterozygous genotype.

Figure 151 Shows the Three Alleles of the Beta-Globin Gene