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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 dominant gene disorder.
(iv) Phenylketonuria is an autosomal recessive gene disorder.
(v) Sickle-cell anaemia is an X-linked recessive gene disorder.

A
(i), (iii) and (v) are correct.
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B
(i) and (iii) are correct.
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C
(ii) and (v) are correc.
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D
(i), (iv) and (v) are correct.
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E
(i), (ii) and (iv) are correct.
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Solution

The correct option is D (i), (ii) and (iv) are correct.
Haemophilia is a sex-linked recessive disease. Down's syndrome is caused due to aneuploidy. It is a result of trisomy of 21st chromosome. Phenylketonuria is an autosomal recessive gene disorder.

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