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A member asked:
Can you tell me how colour blindness occurs?
A doctor has provided 1 answer
Yes: Most cases are caused by a lack of one of three types of cones in the retina, and is a genetic disorder. The most common type is red-green colorblindness and it is x-linked recessive, meaning it occurs in males every other generation. It is carried by females.
Answered 7/7/2014
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