01:34
Mental Retardation and Genetics
Dean Hamer, Director of the Gene Structure and Regulation Unit at the National Cancer Institute, talks about the role genetics plays in many forms of mental retardation. In the case of PKU, a type of retardation that's caused by an enzyme deficiency...
02:08
Genetic Testing Options
Dr. Ed McCabe, Chief of the Mattel Children's Hospital at UCLA, talks about the process he follows when a couple comes to him without a known history of disease or genetic red flags. Dr. McCabe explains that he begins with a very detailed family his...