The inheritance of sickle cell anemia involves incomplete dominance. (S determines normal hemoglobin, it is dominant; s is the sickle cell gene). A homozygous recessive person has sickle cell anemia. A heterozygous person has the sickle cell trait. If

parental genotypes are SS and ss, what is the probability of offspring having the sickle cell trait?

A) 50%; half are Ss B) 100%; all are Ss C) 25%; one quarter are Ss


Answer: B

Anatomy & Physiology

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