Which genetic difference in color vision would cause someone to see the most color metamers when doing a color-matching experiment?

Question

Quizplus · Accepted Answer

Rod monochromatism, also known as achromatopsia, is a condition where an individual lacks functioning cone cells in the retina, relying solely on rod cells for vision. Since rod cells do not provide color vision, individuals with rod monochromatism perceive the world in shades of gray, leading to the highest number of color metamers (different spectral power distributions perceived as the same color) in color-matching experiments.

Which Genetic Difference in Color Vision Would Cause Someone to See