Which of the following is a genetic disorder?

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(D) Phenylketonuria $(PKU)$ is an inborn error of metabolism that is inherited as an autosomal recessive trait.It is caused by a mutation in the gene

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Phenylketonuria

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(D) Phenylketonuria $(PKU)$ is an inborn error of metabolism that is inherited as an autosomal recessive trait.It is caused by a mutation in the gene that codes for the enzyme phenylalanine hydroxylase,which leads to the accumulation of phenylalanine in the body.Cataract,leprosy,and night blindness are generally not classified as genetic disorders in the context of Mendelian inheritance; leprosy is an infectious disease,while cataract and night blindness can be caused by environmental factors,aging,or nutritional deficiencies.

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