By Alisa Beckwith-Ayilliath, Alabama Public Radio
http://stream.publicbroadcasting.net/production/mp3/wual/local-wual-660888.mp3
Tuscaloosa, AL – In the final installment of Alabama Public Radio's DNA Files series, we look at genetics and ethnicity. As Alisa Beckwith-Ayilliath reports, science is raising new questions about the way we think about ourselves.