@Shaman:
don't go far to ahead now, it might be a possibility. the pink hair gene isn't really known to be heriditary or not because for some reason through out the whole series we haven't seen sakura's parents and they are not even dead and we at least seen naruto's and saskues parents. so there is no excuse of why they haven't been shown yet
I don't think saying she is "most likely not related to Sakura" is getting ahead of myself at all. She's less likely to be related to Sakura, for example, than to be related to Kiba, if those facial markings are any indication.
If Sakura knew that the legendary Kakashi was in the same team as a dead relative of hers we'd probably have found out by now. Kakashi would definitely have mentioned something to her like "I'm sorry I couldn't protect your aunt," or something along those lines, as much as he beats himself up over Obito (and presumably Rin's deaths), instead of pretty much not training her at ALL.
Virtually every child in this series has inherited the hair color of their parents. The male children all have their dad's hair, and the female children all have their mom's hair as far as we've seen.
To start talking about dominant and recessive hair genes in order to support some baseless relative theory is getting ahead of oneself… imo.