Select the correct match.

Mark the correct statement with respect to sickle-cell anaemia.

Given below are two statements:
Statement $I$: Sickle cell anaemia and Haemophilia are autosomal dominant traits.
Statement $II$: Sickle cell anaemia and Haemophilia are disorders of the blood.
In the light of the above statements,choose the correct answer from the options given below:

Which of the following is a sex-linked disease?

$A$ normal-visioned woman, whose father is colour-blind, marries a normal-visioned man. What would be the probability of her sons and daughters being colour-blind? Explain with the help of a pedigree chart.

Brachydactyly is due to