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Biology · PYQ NEET UG 2016(1)
हिन्दीPick out the correct statements: a. Haemophilia is a sex-linked recessive disease. b. Down's syndrome is due to aneuploidy. c. Phenylketonuria is an autosomal recessive gene disorder. d. Sickle cell anaemia is an X-linked recessive gene disorder.
Correct answer · Option 4
a, b and c are correct.
Explanation
Statements a, b, and c are correct. Haemophilia is X-linked recessive, Down's syndrome is caused by chromosomal aneuploidy (trisomy 21), and Phenylketonuria is an autosomal recessive disorder. Sickle cell anaemia (d) is an autosomal recessive disorder, not X-linked.
