Carrier organism refers to an individual,which carries a

In humans,color blindness is caused by:

Give differences: Mendelian disorders and Chromosomal disorders.

Sickle cell anaemia is due to

Both husband and wife have normal vision,though their fathers were colour blind and their mothers did not have any gene for colour blindness. The probability of their daughters becoming colour blind is (in $\%$)

If a colorblind man marries a woman with normal vision,what is the probability of their son being colorblind?