In man,the genetic disorder 'Aniridia' (congenital absence of the iris) occurs due to:

$A$ man whose father was colorblind marries a woman who has a colorblind mother and a normal father. What is the percentage probability of their male children being colorblind (in $\%$)?

Sickle cell anaemia is more common in certain regions due to evolutionary adaptations against malaria. The molecular basis of this disease is:

If a color-blind woman marries a normal man,their offspring will be:

Which of the following disorders is not hereditary?

Which one is a sex-linked disease?