It's possible - http://www.webmd.com/add-adhd/guide/adhd-causes.
Its a good article,but the link didn't go through for me. Once you are on Webmd - do a search for ADHD causes and you will find it.
But, yes, there is a strong genetic component. But, it is certainly not 100%. The advantage you will have is that you have the experience to help your child, if your child does have ADHD. Many kid's parents don't have a clue until the school system gets involved.