Your father is heterozygous for a recessive disorder. You know your mother has two "good" alleles. What is the probability that you will have the disorder?
A) 0%
B) 25%
C) 50%
D) 75%
E) 100%

Question

Quizplus · Accepted Answer

Since your mother has two "good" alleles, she can only pass on a "good" allele. Your father, being heterozygous, has one "good" allele and one "bad" allele. Therefore, you can only inherit one "bad" allele from your father and a "good" allele from your mother, making it impossible for you to have the disorder, which requires two "bad" alleles.

Your Father Is Heterozygous for a Recessive Disorder