NEET BIOLOGY

Detailed explanation-1: -Colour blindness is more common in men than in women because the genes responsible for the color blindness are located on the X chromosome. Males have only one X chromosome whereas females have two X chromosomes. In males, only one defective X chromosome is enough to cause colour blindness.

Detailed explanation-2: -Since it’s passed down on the X chromosome, red-green color blindness is more common in men. This is because: Males have only 1 X chromosome, from their mother. If that X chromosome has the gene for red-green color blindness (instead of a normal X chromosome), they will have red-green color blindness.

Detailed explanation-3: -Color blindness is determined by a sex-linked recessive allele found on the X chromosome. A family has a daughter that sees normally, but a son that is color blind. The mother and father both have normal vision. The maternal grandfather also has normal vision.

Detailed explanation-4: -Most commonly, color blindness is inherited as a recessive trait on the X chromosome. This is known in genetics as X-linked recessive inheritance. As a result, the condition tends to affect males more often than females (8% male, 0.5% female).

Detailed explanation-5: -Examples of X-linked recessive conditions include red-green color blindness and hemophilia A: Red-green color blindness.