JKPSC KAS 2023 · Question 90 of 100

Consider the following: 1. Haemophilia; 2. Cystic fibrosis; 3. Sickle-cell anaemia; 4. Down's Syndrome. How many of the above are Mendelian disorders?

General Science

Answer: C. Only three

Haemophilia, cystic fibrosis and sickle-cell anaemia are single-gene Mendelian disorders; Down's Syndrome is a chromosomal (trisomy 21) disorder.

Source: JKPSC KAS Prelims 2023 (Set A) via TheExamPillar

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