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NEET BIOLOGYMedium

Pick out the correct statements: I: Haemophilia is a sex-linked recessive disease. II: Down’s syndrome is due to aneuploidy. III: Phenylketonuria is an autosomal recessive gene disorder. IV: Sickle cell anaemia is an X-linked recessive gene disorder

A

II and IV are correct

B

I, III and IV are correct

C

I, II and III are correct

D

I and IV are correct

Step-by-Step Solution

  1. Haemophilia is a sex-linked recessive disease .
  2. Down’s syndrome results from the gain of an extra copy of chromosome 21 (trisomy), which is a type of aneuploidy caused by failure of segregation of chromatids , .
  3. Phenylketonuria is an inborn error of metabolism inherited as an autosomal recessive trait .
  4. Sickle-cell anaemia is an autosome linked recessive trait, not an X-linked disorder . Therefore, statements I, II, and III are correct.
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Solved: BIOLOGY Question for NEET | Sushrut