In which of the following is colour blindness inherited?

If a father and son are both defective in red-green colour vision,is it likely that the son inherited the trait from his father? Comment.

The $ . . . . . . $ is regarded as an inborn metabolic disorder.

$A$ normal-visioned woman, whose father is colour-blind, marries a normal-visioned man. What would be the probability of her sons and daughters being colour-blind? Explain with the help of a pedigree chart.

Which of the following diseases is autosomal recessive?

In the provided pedigree,assume that no outsider marrying into the family carries the disease. Determine the genotypes of $C$ and $D$.