What is the carrier frequency for PKU in the general population?

The carrier frequency for phenylketonuria (PKU) in the general population is approximately 1 in 50 individuals. This statistic reflects the prevalence of carriers, meaning that these individuals possess one copy of the mutated gene associated with PKU but typically do not express the disorder themselves since PKU is autosomal recessive.

Understanding why this carrier frequency is significant involves recognizing its implications for genetic counseling and population screening. Carriers have a 25% chance of having an affected child with another carrier, emphasizing the importance of genetic testing for couples planning to conceive, especially if they belong to groups known to have higher frequencies of PKU.

The other options do not accurately reflect the established carrier prevalence for PKU in the general population, and therefore do not serve as correct answers. Accurate knowledge of such statistics is crucial for genetic counselors when assessing risk and guiding families in decision-making regarding genetic testing and family planning.