It can. It is rare. But there are a lot of families with a lot of autoimmune diseases running through their genetic makeup, how it manifests in people can be interesting. That being said, there is a low percentage that a parent will give birth to a child that will also have IBD, specifically the same kind of IBD.
I personally have a cousin through marriage who has Crohn's. We often joke that we have all aspects of autoimmune diseases covered. She has Crohn's, I have ulcerative colitis, our cousin has lupus, my brother, T1 diabetes, my father psoriasis and our grandmother has RA. 😀
-Brooke
(inflammatoryboweldisease.net Team Member)