Scientists Identify Genes Involved in Autism

WHY IT MATTERS: Christopher Walsh, chief of genetics at Children's Hospital Boston, says the study represents the first use of a genetic technique that may ultimately help researchers identify risk factors for autism.

Repetitively stacking or lining objects may indicate autism : Wikipedia

Wikipedia
Repetitively stacking or lining objects may indicate autism

Research involving large Middle Eastern families, sophisticated genetic analysis and groundbreaking neuroscience has implicated a half-dozen new genes in autism.

The study strongly supports the emerging idea that autism stems from disruptions in the brain's ability to form new connections in response to experience – consistent with autism's onset during the first year of life, when many of these connections are normally made.

Source: 
Audio excerpt from the weekly podcast of the journal Science