Question

Which of the following diseases belongs to the same category as colour blindness in a man?
A. Night blindness
B. Presbyopia
C. Diabetes incipidus
D. Haemophilia

Answer 1

Hint:
Before we proceed into the problem, it is important to know the definition of colour blindness.
This can lead to difficulty distinguishing between different hues and makes it difficult to choose clothes that will look good on you. Some common types of colour blindness include red-green colour blindness and blue-yellow color blindness.

Complete step by step solution:
The inheritance of features via genes on the X chromosome is referred to as X-linked inheritance. Males have one 'X' and one 'Y' chromosome, whereas females have two. Females only express X-linked recessive genes if there are two copies of the gene (one on each X chromosome).
However, for men, only one copy of an X-linked recessive gene is required for the characteristic or condition to be displayed. Red-green colour blindness and haemophilia A are two X-linked recessive disorders.
Haemophilia and colour blindness are recessive sex-linked diseases.
Therefore, Haemophilia belongs to the same category as colour blindness in men.

Option ‘D’ is correct

Note:
Haemophilia is a condition in which there is a lack of functioning blood clotting factors. This often results in excessive bleeding and can be life-threatening. There are two main types of haemophilia, classic and severe disorder (HSC). Classic haemophilia affects about 1 in 5,000 people while HSC affects up to 1% of the population.