Okay so just wanted to chime in on a Game of Thrones theory.
I believe that Jon Snow is not the son of Ned, but the son of Lyanna. Furthermore, I believe he is the son of Rhaegar Targaryen. I think that Ghost is not white because Jon is a “snow”, but because he is a Targaryen. Now, people have argued against this theory because Jon’s hand gets burned, well Viserys did not have the same power as Dany in terms of being able to withstand fire, and we all know he was a Targaryen. Also, they argue that his hair color wouldn’t be jet black. Well, we know that for Robert Baratheon, his genes for black hair completely overruled the genes for blonde hair in regards to his bastards, like Gendry for example. (Though I’m not sure I am convinced that Gendry is a bastard) So, is it so far fetched that the seemingly “dominant” traits of a Targaryen are actually recessive and only seem dominant due to their history of inbreeding?