Grace at Kids Health Notes and Kristina at Autism Vox have both written about the gene CNTNAP2 being unequivocally implicated in Type 1 Autism.
In her article CNTNAP2, an autism susceptibility gene which I highly recommend,  Kristina writes a personal account of her ongoing experience with her son Charlie’s autism and discusses the recent research findings.
Do read Grace’s article titled CNTNAP2 ‘unequivocally implicated’ in Type 1 autism which summarizes the three main pieces of research appearing in the American Journal of Genetics.
For the scientists:
Contactin Associated Protein-Like 2 is also known as CDFE; NRXN4; CASPR2; DKFZp781D1846. This gene encodes a member of the …read more

My colleague Kristina at Autism Vox has written a great article about the genetic basis of Autism.  Research has indicated that either a deletion or a duplication of a section of chromosome 16 seems to contribute strongly to susceptibility to autism.
I highly recommend you click on the following link to read more:
http://www.autismvox.com/like-father-like-son/
Elaine Warburton