This lecture will cover the molecular genetics of human color vision, and the way in which evolutionary changes at the receptor level have shaped the different color vision capacities of different species as well as differences in color vision among individuals within our own species. Lecture Objectives: Understand the main themes in the history of color vision research; Understand the way in which gene rearrangements produce variant human red-green color vision; Understand how genetically engineered mice have contributed to research on primate color vision.