I'm not sure how to write this without implying a spoiler, so don't read on if you haven't met Father yet.
I seem to recall Dad's features changing depending upon how you designed your character in Fallout 3.
In Fallout 4, I can't decide if Father's features change. I tried making a black character, and found that his skin tone changed to match, but he still looked pretty much the same.
Has anyone tested this? How much do they change, if at all?