In skip generation inheritance of colour blindness, the trait from a colourblind man is passed on to ____________.

daughter

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Son

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Grand daughter

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Grand son

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Solution

The correct option is D Grand son
$∙$ colourblindness is an x-linked recessive trait.
$∙$ If man is colourblind(generation I) then all son is normal & daughter is carrier(generation II), then in next generation(Generation III)
$∙$ Grandson is colourblind or normal.
$∙$ daughter is normal or carrier.
So, option D is correct here.

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