Which of the following disorders is caused by a qualitative defect in the synthesis of globin molecules, leading to impaired $O_2$ transport?

The gene for colour blindness is located on

Choose the incorrect statement for haemophilia.

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:

Autosomal dominant disorder $- P$
Autosomal recessive disorder $- Q$
$X$-linked recessive disorder $- R$
$I -$ Haemophilia,$II -$ Sickle cell anaemia,$III -$ Phenylketonuria,
$IV -$ Thalassaemia,$V -$ Colour blindness,$VI -$ Myotonic dystrophy
Select the correct option for $P, Q$ and $R$.
$\quad\quad P \quad\quad Q \quad\quad R$

Color blindness is a ..... trait.