Asperger Syndrome (AS), a subtype of Autism Spectrum Disorder (ASD), is believed to be caused by a mix of genetic, neurological, and environmental factors. There is a specific gene called GABRB3 that tends to have specific variations in people with ASD, including Asperger Syndrome. Additionally, copy number variants (CNVs), which are alterations in DNA that can disrupt how a gene functions, have been found in about 9% of clinically examined individuals with ASD. It's important to note that there is overlapping genetics between ASD and other neurological and psychiatric disorders.