Which X-linked recessive vision disorder, affecting about 8% of Caucasian males, is known as red-green?

• A. Night blindness
• B. Macular degeneration
• C. Color blindness
• D. Glaucoma

Answer: (C)

Verified step by step guidance

1. Understand that the question asks for an X-linked recessive vision disorder affecting about 8% of Caucasian males, specifically related to red-green vision.
2. Recall that X-linked recessive disorders are more common in males because males have only one X chromosome, so a single recessive allele on the X chromosome will express the trait.
3. Identify that red-green color blindness is a classic example of an X-linked recessive disorder affecting color perception, particularly the ability to distinguish red and green hues.
4. Recognize that other options like night blindness, macular degeneration, and glaucoma are not primarily X-linked recessive nor specifically related to red-green color vision deficiency.
5. Conclude that the disorder described is red-green color blindness, which fits the inheritance pattern and prevalence described.