DNA tests are a game-changing technology poised to reshape how we see ourselves and live our lives. So-called direct-to-consumer DNA testing companies like 23andMe, Ancestry and Helix advertise the ability to reveal your ancestry, inform you of your health status, and even guide you on how to exercise and eat -- all for $200 or less. Recent headlines have highlighted the role of the personal genomics revolution in solving crimes. But Once your genetic information is out in the world, it can be hard to control how it is used. Charlie Pellet talks to Bloomberg's Kristen Brown about the issue.