You're right about how interesting genetics can be. My granddaughter is 1/4 each Irish, Italian, Armenian, American Indian. Her mother is very exotic looking with dark complexion and green eyes. She is fair, with sandy colored hair and big blue eyes. Still waiting to see what my new (3 month old) grandaughter will look like....she's 1/4 each Irish, Italian, Spanish and Norwegian! Can't really tell her coloring yet. I think it's awesome thinking about the spectrum of looks in this new global world of ours.
My sister's son is Blond and blond can be, her girls have brown hair and did even at birth! The Roberts kids are very cute and I am glad they are to little to know what is going on.