A normal­visioned man whose father was colour­ blind, marries a woman whose father was also colour­blind. They have their first child as a daughter. What are the chances that this child would be colour­ blind ?

Write short note Haemophilia .

In the given pedigree, indicate whether the shaded symbols indicate dominant or recessive allele.

An example of a disease of molecular mutation is

A marriage between normal visioned man and colourblind woman will produce which of the following types of offsprings