Pick out the correct statements: (i) Haemophilia is a sex-linked recessive disease. (ii) Down's syndrome is…

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.
  1. (i) and (iv) are correct
  2. (ii) and (iv) are correct
  3. (i), (iii) and (iv) are correct
  4. (i), (ii) and (iii) are correct

Solution

Haemophilia is a sex-linked recessive disease in which there is a problem in clotting of blood.
Down's syndrome (trisomy 21) is caused due to aneuploidy.
Phenylketonuria is an autosomal recessive gene disorder.
Sickle cell anaemia is autosomal recessive gene disorder.

Asked in: NEET 2016 (Phase 1)

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