Board Thread:The Heroes of Olympus/@comment-5896827-20160731081509/@comment-28759193-20160731195207

I actually a bit confused, but I will try my best to answer.

Confirmed, Gods have no DNA. I remember vaguely that Percy stated in a book in PJO. I think it was Last Olympian when he was explaining how it was okay for Silena and Beckendorf to date since the Gods did not have DNA.

Now, sure, Sally tells Percy that he 'has his father's green eyes' but we can assume that this is just another of RR's famous flukes. He should hire a pro-editor, seriously.

Anyway, since it is stated that Gods do not have DNA, then we can guess that demigods get all their traits from their mortal parents, with all demigods mentioned (apart from the Percy fluke) possessing particular traits of their mortal parents.

Annabeth, who you mentioned, like... is Athena a blonde? I can't remember, but anyway, in Titan's curse Percy mentioned that Annabeth's dad and Annabeth had the same blonde hair. Though, there is a fluke in Annabeth too, since she has her mother's grey eyes, but anyway.

As for Nico, I have no memory of anytime of which Nico and Hades look alike except for that they both radiate death, which is just one of those common traits with all children of Hades when they are developed, like Poseidon's children smelling like the sea. Percy says Nico has the pale skin of his mother, her dark hair and eyes.

As for Clarisse and Will we have never seen their mortal parents so we can't judge.

Hope I answered your question!