In this Oct. 29, 2012 photo professor Jeff Murray talks to University of Iowa students in his personal genetics class in which students had the option of sending saliva samples so a tes

 

              In this Oct. 29, 2012 photo professor Jeff Murray talks to University of Iowa students in his personal genetics class in which students had the option of sending saliva samples so a tes
In this Oct. 29, 2012 photo professor Jeff Murray talks to University of Iowa students in his personal genetics class 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)