ALL of us, "mentally ill" or not, have our own genetic inheritance. Of course it plays a PART in any illness. My brothers and I have distinctly different personalities, partly due most probably to genetic factors. I think those differences also played a part in how we were treated as children and how we reacted to that treatment.

I have three nieces; their mother said they were different in the womb. I have two cats, brother and sister. They have distinctly different personalities.

I feel that the assignment of any mental disorder to any specific gene is bogus. In spite of constantly recurring news headlines identifying such genes.