so,on my mom side
Male cousin:asperger
Female Cousin:autism
me:Autism/PDD,OCD,LD
Mom's cousin/my first cousin,once remove:Asperger
my mother had 2 full sister,and each had one child with ASD.
not sure about her half brother or half sister kids.
Mother cousin is on her Mother side(my Grandmother)
I would say the Autism gene,comes from my maternal grandmother side.
I've a brother,sister both NT
mom sister 1:5 kids,1 with Autism,4 NT
mom sister 2:5 kids,1 with Asperger,4 NT
so,it only effect 1 child per family.