Researchers have identified a chromosomal abnormality that seems to increase a person's chances of developing autism.
A group of U.S. researchers, associated with a group of Boston-based hospitals known as the Autism Consortium, conducted complete genome scans of 1,400 samples of DNA from families of autistic children.
They found that in one per cent of people with autism, or similar disorders, a portion of chromosome 16 is either absent or duplicated. This is not inherited from the parents.
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