Question

Colour blindness is a ______
a) Deficiency disease
b) X-linked disease
c) Y-linked disease
d) XY-linked disease

Answer 1

Deficiency disease is correct answer

Answer 2

Answer:

b) X-linked disease

Explanation:

Colour blindness is a sex-linked recessive disease in which an individual is not capable to differentiate in the colors of red, blue, yellow and green. It is a Mendelian genetic disorder that inherits from one generation to the next generation. The number of affected men are more than women. Because the gene responsible for colour blindness is located on the X chromosomes and a man has only one X chromosome while woman has two X chromosomes. If woman have two gene responsible for this disease located on both X chromosomes, results colour blindness and if only one X chromosome is affected then women may be carrier for this disease.