Which of the following are examples of Mendelian disorders?

Biology Principles of Inheritance and Variation Skill Builder Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 21, 2026

Cystic fibrosis
, ,

Down's syndrome
and and ,

Phenylketonuria
and (E) only only and

Klinefelter's syndrome
(E) Thalassemia Choose the correct option: only only

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The correct answer is:

Cystic fibrosis, Phenylketonuria, and Thalassemia are Mendelian disorders, which means they result from mutations in single gene and follow Mendelian inheritance patterns. In contrast, Down's syndrome and Klinefelter syndrome are chromosomal disorders caused by abnormalities in chromosome number.

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