Autism linked to hundreds of genetic mutations

Three new studies conclude that autism disorders are genetically very complex, not caused by one or two gene defects. The potential changes in DNA may produce what are essentially different forms of autism.Autism is not caused by one or two gene defects but probably by hundreds of different mutations, many of which arise spontaneously, according to research that examined the genetic underpinnings of the disorder in more than 1,000 families.

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