Aphenotypically 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%