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The human male never passes on the gene ...

The human male never passes on the gene for haemophillia to his son. Why?

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Male sex is determined by Y-chromosome which does not bear the gene for haemophillia.
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OSWAAL PUBLICATION-PRINCIPLES OF INHERITANCE AND VARIATIONS -(TOPIC 2 ) (SEX DETERMINATION AND GENETIC DISORDERS (SHORT ANSWER TYPE QUESTIONS-I))
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