Principle of Inheritance and VariationHard

Question

Haemophilia is more common in males because it is a

Options

A.recesive character carried by Y- chromosome
B.dominant character carried by Y- chromosome
C.dominant trait carried by Y- chromosome
D.recesive trait carried by Y- chromosome

Solution

Haemophilia is a disorder, which is sex-linked (X-chromosome) recesive condition. Males have only one X-chromosome, so this disease appears in them more them more then female as they have 2X-chromosomes.

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