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Advances in DNA sequencing technology during the past decade have given scientists powerful tools to peer into the genomes of humans and other species. Despite the efficiency and sophistication of these technologies – known as massively parallel, or next-generation, sequencers – some of the genome’s secrets still remain hidden.

Piecing together the causes of autism.

Autism spectrum disorders (ASD) are among the most heritable of all neuropsychiatric conditions. Yet, most genetic links to ASD found in recent years have involved de novo mutations, which are not passed from parent to child, but instead arise spontaneously. While these mutations help explain how ASD develops in a fraction of cases, they don’t help us understand why autism so often runs in families.