So I've recently taken to playing as the Daynes (Stone Dornish in western Dorne), given that I find their history pretty cool. I managed to marry Myrcella Lannister (in case that matters), but I find that no matter how many times I reload I never get any white-haired children (I console-age them to maturity to check). I'm not entirely sure how CK2's "genetics" work (and to be honest I would've assumed it worked on basis of character information rather than by culture), but as soon as I switched culture to West Valyrian, my first child ended up white-haired. Was my inability to continue my pseudo-Valyrian heritage as a Dornishman just a series of bad luck, or is it dependant on culture as well?