@baldafrique
It's an interesting concept that NT siblings could be carriers of ASD genes despite not having it themselves
I’m no scientist, but aren’t most hereditary conditions capable of being carried without being expressed in the carrier?
I would be very surprised if it turns out to be a gene or genes that lie dormant for generations, though. My observation is that most children diagnose on that spectrum either have a patent or grandparent that presents as possibly/probably autistic, and often several relatives meeting that description.
I will also eat my hat if the much quoted “environmental factors” are ever identified. That’s just a continuation of the awful way parents have been blamed since autism was first discovered. I’m quite sure autism is purely genetic, based on my own experience and observation. (I wish I could find a bookies to accept that bet. I would happily stake a grand!)
The problem is that for several decades only “Kanner” autism was diagnosed and - horribly - there came to be a stigma attached to that and now that HF autistic conditions are better recognised, and all autism is better understood, that stigma still lingers.