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Associated Press
In this Oct. 29, 2012 photo professor Jeff Murray teaches a personal genetics class at the University of Iowa in which students had the option of sending saliva samples so a testing company could use DNA to unlock some of their most personal health and family secrets. The class, taught at Iowa for the first time, is part of a growing movement in higher education to tackle the rapidly advancing field of personal genetics, which is revolutionizing medicine and raising difficult ethical and privacy questions. (AP Photo/Brian Ray)

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