Explain red-green color blindness and its genetic basis.

Explain red-green color blindness and its genetic basis.

• A. Defect in blue cone opsins causing blue-yellow confusion.
• B. Autosomal recessive defect in rod opsin.
• C. Defect in choroidal blood supply causing color dullness.
• D. X-linked defect in L or M cone opsins leading to impaired discrimination between red and green hues; more common in males.

Answer: (D)