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If the mother carries the recessive PKU gene, and the father does not, then....?
A) no child will be afflicted with PKU, although two in four will carry the recessive gene.
B) all children will carry the recessive gene.
C) no child will be afflicted with PKU, and no child will carry the recessive gene.
D) one in four children will have PKU.
1 Answer
- ?Lv 77 years agoFavorite Answer
PKU is known to be an autosomal recessive genetic disorder. This means both parents must have at least one mutated allele of the PAH gene. The child must inherit both mutated alleles, one from each parent. Therefore, if both parents are carriers for PKU, there is a 25% chance their child with develop the disorder, a 50% chance their child will be a carrier, and a 25% chance their child will neither develop nor be a carrier for the disease.