Starting for students applying to Carnegie Mellon in fall 2016, all undergraduates admitted to the School of Computer Science will choose one of two majors: computer science and the new computational biology major.
There is a press release about the program at http://www.cbd.cmu.edu/1037/, and the program homepage is http://www.cbd.cmu.edu/education/bs-in-computational-biology/.
I am the Program Director and would be happy to answer any questions that you might have.