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Question

Which of the following is not an example of recessive autosomal disease?

A
Haemophilia
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B
Cystic fibrosis
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C
Phenylketonuria
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D
Sickle-cell anaemia
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Solution

The correct option is A Haemophilia
Haemophilia is a sex-linked recessive disease in which the patient continues to bleed even from a minor cut since he or she does not possess the natural phenomenon of blood clotting. Genetically haernophilia is caused due to the presence of a recessive gene h, carried by X-chromosome. Cystic fibrosis, phenylketonuria, sickle-cell anaemia, alkaptonuria, albinism etc. are-the examples of autosomal recessive disorders. So, the correct answer is 'Haemophilia'.

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