All sons of a couple are colourblind because

If a normal woman marries a colourblind man,what will be the phenotype of their children?

Study the pedigree chart of a certain family given below and select the correct conclusion which can be drawn for the character.

The distortion of hemoglobin under low oxygen tension is a characteristic of which of the following?

If a colour blind man marries a normal visioned woman,what is the percentage of offsprings showing colour blindness phenotypically (in $\%$)?

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 $\%$)