One Shots [And Headcanons] Percabeth - Percy Jackson - Heroes Of Olympus

Answers?

Um, so I have a general question.
I was just reading a comment about if Annabeth and Jason were technically niece and uncle, but gods don't have DNA so it doesn't matter, yada, yada.
But if gods don't have DNA then how do they create children?
A child is made up of half the mothers DNA and half the fathers DNA... but if the gods don't have DNA then how the heck do they pass traits and features down to their children, let alone even be able to make children in the first place?

Im probably thinking about this too logically because, let's face it, gods aren't really believed logically, its more spiritually.

Anyone who is smart out there who understands this and has answers?!?!?!?!?!?

<3 P.S sorry for not updating :(