Subject: What is the probability of grandchildren getting disease the parents don't?

I am wondering the chances are of getting diabetes if both maternal 
grandparents have it and all 3 of their children do not.  Being the grandchild, 
I am wondering how I would be at a high risk of getting diabetes if neither of 
my paternal grandparents or both parents have the disease, only both maternal 
grandparents.  I was just curious to see if both me and my brother would still 
be at high risk of becomming diabetic and if so, how?

Re: What is the probability of grandchildren getting disease the parents don't?