Heredity? | ADHD Information

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50/50 I reckon - but I aint no genetic scientist.  Dont label him yet !

Hi Everyone! I have a dumb question (of course)

I am gonna be a grandma!!!!!!! I was wondering if anyone knows what the chances are of the baby having ADHD.  I know its possible.  I have

it and 2 sons (1ADD 1ADHD).  My niece also, and we are pretty sure my dad did!  But my sons wife has no one on her side that we know of. 

Does anyone know the chance of the baby having it.  We don't care as long as its healthy, but I was wondeing if it rund rampid on 1 side, whats the chances?

PROUD GRANDMA SCATS