Phenylketonuria (PKU) __________.
A) demonstrates the inevitable relationship between genotype and phenotype
B) is a genetically inherited disorder that cannot be affected by environmental influences
C) is a genetically inherited disorder affected by environmental influences
D) demonstrates that inherited traits cannot be altered

Question

Quizplus · Accepted Answer

Phenylketonuria (PKU) is a genetically inherited disorder caused by a mutation in the phenylalanine hydroxylase (PAH) gene. However, the severity of the disorder can be influenced by environmental factors such as diet. A low-phenylalanine diet can help manage the symptoms of PKU. Therefore, PKU is a genetically inherited disorder affected by environmental influences.