Basic genetic diseases as inheritance examples

NCERT Biology Class 12, Chapter 7

Basic genetic diseases as inheritance examples NEET Biology MCQ

Last updated: July 30, 2026

Reviewed by MedQGo Editorial Team | Last updated: July 30, 2026

Phenylketonuria occurs due to the deficiency of phenylalanine hydroxylase leading to

Ametabolic substrate accumulation

Bmetabolic byproduct accumulation

Caccumulation of metabolic intermediate

Dlack of metabolic end product

Correct answer: A. metabolic substrate accumulation

Phenylketonuria is caused by the deficiency of phenylalanine hydroxylase, which leads to the accumulation of phenylalanine as a metabolic substrate.

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More Basic genetic diseases as inheritance examples MCQs

Which single-gene disorder can be induced by environmental factors?Which of the following genetic diseases can be diagnosed through chromosomal analysis?Which disease is caused due to a deficiency in galactose-1-phosphate uridylyltransferase?Which of the following genetic diseases is caused by lysosomal enzyme deficiency?A couple with no phenotypic symptoms of phenylketonuria have given birth to three children affected by the condition. What is the probability that they will have a phenotypically normal child in their future offspring?