troll -1 writes: Mice are dichromats, they have only S and M cone pigments. They don't see color too well. But now researchers at Johns Hopkins University School of Medicine and the University of California at Santa Barbara have successfully transformed their vision by introducing a single human gene into a mouse chromosome. Jeremy Nathans, one of the authors of the study, describes it as 'the same evolutionary event that happened in one of the distant ancestors of all primates and that led ultimately to the trichromatic color vision'.
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