Board Thread:The Heroes of Olympus/@comment-5896827-20160731081509/@comment-1515612-20160801002201

Gods can transform into whatever they want, so I'm pretty sure that they can chance ethnicities as well and appear as whatever. For Hazel the only excuse I can pull from my ass is that back in the 40's interracial marriage wasn't legal until 1967 and it was generally seriously frowned upon back then for interracial relationships.

Although, they say that gods technically have no DNA their traits do get passed out since children have their powers (water, lightning, etc).

It's a confusing concept. RR would most likely never expand upon the idea anyway.