Which of the following cannot be included in Mendelian disorders?

Haemophilia is a type of genetic disorder that is:

Which of the following is a sex-linked character?

The daughter born to a haemophilic father and a normal mother could be:

Sickle cell anaemia is

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 $\%$)