Haemophilia and colour blindness are x chromosome related genetic disorders

Introduction:
Haemophilia is a genetic disorder that affects blood clotting in humans. It is inherited on the X chromosome and primarily affects males. There are several other genetic disorders that belong to the same category as haemophilia. Let's explore the options given and determine which one of them is related to haemophilia.

Explanation:

a) Hypermetropia:
Hypermetropia, also known as farsightedness, is a refractive error of the eye where distant objects are seen more clearly than nearby objects. It is caused by the shape of the eye, particularly the cornea or lens, which prevents light from focusing directly on the retina. Hypermetropia is not related to haemophilia and is not a genetic disorder.

b) Rabies:
Rabies is a viral disease that affects the central nervous system of mammals, including humans. It is primarily transmitted through the bite of an infected animal, most commonly dogs. Rabies is not related to haemophilia and is not a genetic disorder.

c) Night blindness:
Night blindness is a condition in which an individual experiences difficulty seeing in low-light conditions or at night. It is often caused by a deficiency of vitamin A or a genetic disorder called retinitis pigmentosa. Night blindness is not related to haemophilia and is not a genetic disorder.

d) Colour blindness:
Colour blindness, also known as color vision deficiency, is a genetic disorder that affects an individual's ability to perceive certain colors. It is primarily caused by an inherited lack or malfunction of certain cone cells in the retina. Colour blindness is related to haemophilia as both are genetic disorders.

Conclusion:
Among the given options, colour blindness is the disease that belongs to the same category as haemophilia. Both are genetic disorders that can be inherited and are caused by mutations in specific genes. While haemophilia affects blood clotting, colour blindness affects an individual's ability to perceive certain colors.