Hello Queen of Hearts: The Skeezyks enjoys reading about current research regarding brain function. From what I've read, I would have to say the jury is still out, so to speak, with regard to the part genetics play in mental illness. What I would suggest based on my own experience, however, is that it's never too early to take a close look at potential mental health concerns. Of course, one has to be cautious. You don't want to get your kids involved in potentially unnecessary or maybe even harmful mental health services. Unfortunately those kinds of things are out there. But on the other hand, if one or both of your kids do have some genuine mental health concerns, overlooking them won't help. At least this is my perspective...