Unlocking your ancestry with a genetic test

The fact that DNA ties us together with our family, is exactly why some people are interested in it. Because as well as your possibly future, your DNA holds the key to your past. Many online services claim to offer you clues about your ancestry. Peter Forster is a fellow in Archaeology in Cambridge University, and also owns such company - Roots for Real - which people use for a variety of different reasons. Georgia Mills asked him about the people who use the service...