You do sometimes get children who have one mixed-race parent and one white who can be quite pale. People like Natasha from Atomic Kitten, Ryan Giggs, Jade Goody are/were this heritage. Although saying that it was much more noticeable when you see pictures of these celebs when they were kidsHe is normally blink and you'll miss him, so yeah, first time I've noticed
(Slightly off topic, but the kid in Emmerdale that's supposed to Nate's daughter is very white for a mixed heritage kid too.)
I think Ryan and the late Jade you could still see it in them as adults. Ryan’s brother looks more dual heritage than Ryan does (presuming they have both the same parents)