Which of the following is an example of a sex-linked disease?

$A$ normal-visioned man,whose father was color-blind,marries a woman whose father was also color-blind. What is the probability that their first child,a daughter,will be color-blind (in $\%$)?

Genetic counsellors can identify heterozygous individuals by

$A$ normal woman,whose father was colour-blind,is married to a normal man. The sons would be

$A$ woman whose father was an albino marries an albino man. What will be the ratio of their offspring?

$A$ woman carrying two genes for haemophilia and one gene for colour blindness on one of her $X$ chromosomes marries a normal man. What will be the phenotype of the progeny?