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Principles Of Inheritance And Variation

Question
CBSEENBI12047202
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Which of the following conditions is related to haemophilia?

  • A responsible recessive gene present in the X-chromosome

  • A responsible dominant gene presentin the X-chromosome

  • A responsible dominant gene present in the Y-chromosome

  • A responsible dominant gene present in the autosomal chromosome

Solution

A.

A responsible recessive gene present in the X-chromosome

Haemophilia is the most serious and notorious disease which is more common in man than in woman. The person which contains the recessive gene for haemophilia lacks normal clotting substance (thromboplastin) in blood so, amino injuries cause continuous bleeding and ultimate death. It is X-linked disease.

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