A Phenotypically Normal Woman Is Heterozygous for the Recessive Mendelian

Multiple Choice

A phenotypically normal woman is heterozygous for the recessive Mendelian allele causing phenylketonuria,a disease caused by the inability to process phenylalanine in food.She is also heterozygous for a recessive X-linked allele causing red-green colorblindness.What percentage of her eggs will carry the dominant allele that allows normal processing of phenylalanine and the X-linked recessive allele that causes colorblindness?

A) 0%
B) 25%
C) 50%
D) 75%
E) 100%