Two parents who do not have sickle cell anemia have a child that has the disease.The parents are both:
A)homozygous for the sickle cell allele.
B)heterozygous for the sickle cell allele.
C)homozygous for the normal allele.
D)epistatic for the sickle cell allele.
E)pleiotropic for the sickle cell allele.

Question

Quizplus · Accepted Answer

If two parents who do not have sickle cell anemia have a child with the disease, it shows that both parents must have been heterozygous carriers of the sickle cell allele (Ss). When the child inherits two copies of the sickle cell allele (SS), they will have sickle cell anemia. This is known as an autosomal recessive trait.

Two Parents Who Do Not Have Sickle Cell Anemia Have