This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Ophthalmology
[{'content': 'Color blindness transmitted through \nSelect and explain. \nA. X-linked recessive, B. Male to male inheritance, C. Autosomal recessive, D. Autosomal dominant', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (A) X-linked recessive # COLOR BLINDNESS> Gross cases occur in 3%--4% of males, but are rare in females (0.4%); milder cases are more common in males.> Colour blindness is an inherited condition, being transmitted as X-linked recessive through the female who is usually unaffected, and is probably due to the absence of one of the photo-pigments normally found in the foveal cones.> In most cases reds and greens are confused, so that the defect is a source of danger in certain occupations, such as in engine- drivers and sailors. The red-green cases fail into two chief groups, protanopes and deuteranopes.', 'role': 'assistant'}]