Yes I believe that there is a genetic diposition to it. Although the children may not all end up with SA.
Like myself, my mother has it and her mother has it, even my father, but I would not classify him having SA, there is alot of issues with him, that has caused him to be who he is. I am the only one actually diagnosed with it. Now my eldest daugher is showing signs of it, which is worrying, and another reason why I am fighting SA so hard right now. Where are my youngest is a complete opposite, but still does show some signs of anxiety as I am currently trying to find out her learning difficultly at school.
But there are other things I find are genetic where others do not..Like child abuse, I believe in same cases it is genetic, where others do not believe so.