I. Enborn error of metabolism. II. Homozygous recessive aut…

Biology Principles of Inheritance and Variation Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 20, 2026

I. Enborn error of metabolism.

II. Homozygous recessive autosomal alleles on chromosome 12 cause absence the specific enzyme

III. A specific amino acid does not change into tyrosine

IV. Accumulation of phenylpyruvic acid and other derivatives leading mental retardation.

The above facts refer to

Phenylketonuria

Muscular dystrophy

Turner's syndrome

Down's syndrome

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