Read the following and answer the questions from given below Colour blindness is a sex-linked recessive disorder, which results in defect in either red or green cone of eye. It does not mean not seeing any colour at all, infact it leads to the failure in discrimination between red and green colour. The gene for colour blindness is present on X-chromosome. It is present mostly in males (XCY) because of the presence of only one X-chromosome as compared to two chromosomes in females. A heterozygous female has normal vision, but is a carrier and passes on the disorder to some of her sons.

(a) If a colourblind man marries a woman who is carrier of colourblind, what will be the probability of their son being colourblind? 

(b) If both parents of a male child are normal, what are the chances of the child being colourblind?

(c) A woman has an X-linked condition on one of her X-chromosomes that chromosome can be inherited by whom? 

OR

(c) Anish is having colour blindness and married to Sheela, who is not colourblind. What is the chance that their son will have the disease?