Red-green color blindness,which involves a deficiency of photopigments in the retina,is an example of a recessive X-linked condition.

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Red-green color blindness is caused by a recessive gene carried on the X chromosome. As males only have one X chromosome, they are more likely to inherit the condition if they receive the faulty X chromosome from their mother. Females can also inherit the condition, but need to receive the faulty X chromosome from both parents, as they have two X chromosomes. Hence, it is an X-linked recessive condition.

Red-Green Color Blindness,which Involves a Deficiency of Photopigments in the Retina,is