The maternal grandfather of a boy is colourblind, but his maternal grandmother is normal. The father of the boy is also normal. What is the probability of this boy being colourblind?

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Sex-Linked Inheritance in Humans, Colour Blindness as Sex-Linked Disorder | PadhAiPro

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TextSex-Linked Inheritance in HumansColour Blindness as Sex-Linked Disorder

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