Question

Pick out the correct statements.

(1) Haemophilia is a sex-linked recessive disease.

(2) Down's syndrome is due to aneuploidy.

(3) Phenylketonuria is an autosomal recessive gene disorder.

(4) Sickle cell anaemia is an X-linked recessive gene disorder.

(a) (1), (3) and (4) are correct.

(b) (1), (2) and (3) are correct.

(c) (1) and (4) are correct.

(d) (2) and (4) are correct.

Answer 1

(b) (1), (2) and (3) are correct

Explanation: Sickle cell anaemia is an autosomal recessive disorder.