Question

justify the statement that it is better to have a colourblind father than a colourblind mother ...........

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Answer 1

If a father is colourblind and mother is normal than none of the progenies (whether girl or boy) won't be colourblind because they have X as dominant which won't allow Y to impart it's characteristics. Whereas through if a mother is colourblind then X chromosome will contain that abnormality which would make their sons colourblind as Y chromosome is recessive so it can't suppress X. This is called criss cross inheritance.
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Answer 2

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