Question

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. (i) and (iv) are correct
• B. (ii) and (iv) are correct
• C. (i), (iii) and (iv) are correct
• D. (i), (ii) and (iii) are correct

Answer 1

Answer: (D)

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.