Question

What ratio is expected in offsprings if father is colour blind and mother's father was colour blind:

Answer 1

If mother's father has clour blindness definitly mother will inheritence of colour blomdness. But mother will aquire some less amount of defect gene. Now father is also clour blind .
Offspring will inherite mother and fathers character through chromosomes in gene.
Definitly offspring will also show clour blindness.

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Answer 2

the ratio which is excepted is of offsprings is that in heridiatary of mother's father get transfer from to the mother of the child so ratio will be 3:1