Q3 of 32 Page 204

Why is the frequency of red-green colour blindness is many times higher in males than in the females?

• Colour blindness is a sex linked(X-linked) recessive disorder.


• X linked disorder expresses themselves in males more frequently, because they have only one copy of X chromosome.


• Whereas, females have two copies of X chromosomes. They will get affected by this disorder only when they have both the copies of affected alleles.


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