In pedigree analysis,the square,blackened,and horizontal lines represent:

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:

Red-green colour blindness appears due to

The distortion of hemoglobin under low oxygen tension is a characteristic of which of the following?

Among symbols $A, B$ and $C$,what does $C$ indicate?

Of a normal couple,half the sons are haemophilic while half the daughters are carriers. The gene is located on $:-$