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Question

Which one is sex linked disease in man?

A
Polio
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B
Alzheimer's disease
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C
Haemophilia
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D
Beriberi
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Solution

The correct option is C Haemophilia
Sex-linked diseases are passed down the families through one of the sex chromosomes, that is X or Y chromosomes. Haemophilia is a sex-linked recessive disease. Haemophilia is a group of hereditary genetic disorders that impair the body's ability to control blood clotting, which is used to stop bleeding when a blood vessel is broken. The genes that produce clotting factor VIII and IX are carried on the X chromosome. If these genes are missing or damaged, it results in haemophilia. It is expressed in males with a higher probability than in females because males only have one X chromosome.
Thus, the correct answer is option C.

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