Sickle Cell Anemia Is a Recessive Trait in Humans

question 30

Multiple Choice

Sickle cell anemia is a recessive trait in humans.In a cross between a father who has sickle cell anemia and a mother who is heterozygous for the gene, what is the probability that their first three children will have the normal phenotype?

• A)1/4
• B)1/2
• C)none
• D)1/8
• E)1/16 will be albino

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