Identify the genotype of the first generation $(I)$ for an autosomal recessive disorder based on the provided pedigree chart.

Who is known as the father of human genetics?

Given below are two statements:
Statement $I$: The son of a carrier woman has a $100$ percent chance of being colour blind.
Statement $II$: $A$ daughter of a carrier mother and a normal father will be $100$ percent colour blind.
In the light of the above statements,choose the correct answer from the options given below:

Mental retardation in children suffering from galactosemia can be avoided by

Write a short note on Haemophilia.

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