Single Choice

A colour blind man marry with a daughter of colour blind father, the generation will be

Aall children will be colorblind
Bonly sons will be colourblind
Conly daughters will be colourblind
Dhalf sons will be colourblind
Correct Answer

Solution

Daughter of a color blind father will be carrier for the trait, as female has two X chromosomes, genotypically she will be heterozygous carrier and will be phenotypically normal. If married to a color blind male. The female progenies will be Normal:carrier in a ratio of 1:1. While, the male progenies will be in a ratio colorblind:normal in a ratio of 1:1
So, the correct answer is 'half sons will be colourblind'

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