A study of twins aims to clarify the roles genes, environment play in autism

By Mariel Waloff | April 9, 2012 |

At first glance Christopher and Gerald Dixon seem like any other pair of twins. They look alike, dress similarly and play together. But Gerald is autistic and Christopher isn’t. The boys were one of 1100 twin pairs who participated in the largest ever study of Autism in twins, the California Autism Twins Study (CATS). The study found that the environment plays a much bigger role in causing autism than previously thought.

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