I'm sure my son is on the spectrum, and so were his school. No formal dx, as yet- the waiting list is so bloody long that he left school before he reached the head of the queue (grr).
His Dad is NT.
Interestingly, I've yet to encounter an aspie mother with an NT son; loads with NT daughters, but sons of Aspie mothers always seem to turnn out be on the spectrum. If there's an exception to that rule on this board, please speak up! I find that particularly interesting, because that's the pattern you get with conditions that are carried on the X-chromosome, like colour-blindness.
I know the genetics of ASD are a lot more complex than that analogy would suggest (and not very well understood, as yet, but still...if that's anywhere near as common as my limited experience suggests, it would have hugely significant implications