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.

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

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

(1) and (4) are correct.

(2) and (4) are correct.

answer is B.

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Detailed Solution

Haemophilia is a sex-linked recessive disease.

Down's syndrome is due to aneuploidy.

Phenylketonuria is an autosomal recessive gene disorder.

Sickle cell anaemia is an autosomal recessive gene disorder.

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