John inherited a recessive allele for sickle cell anemia from his mother and a normal allele from her father. John:
A) has sickle cell anemia.
B) is a carrier of sickle cell anemia.
C) neither has or is a carrier of sickle cell anemia.
D) has a 25% chance of getting sickle cell anemia.

Question

Quizplus · Accepted Answer

John is a carrier of sickle cell anemia because he inherited one recessive allele for the condition and one normal allele, meaning he does not express the disease but can pass the allele to his offspring.

John Inherited a Recessive Allele for Sickle Cell Anemia from His