User blog comment:Yunhua98/Quarter Bloods/@comment-3146930-20120322201338/@comment-4405503-20120324033645

Actually, Percy and Annabeth having a child would look like Poseidon/Percy because Percy has inherited an overwhelming sector of his looks. Annabeth has only her mother's eyes.

Thusly we can conclude that Poseidon has dominancy, whereas Athena is recessive.

A first child of Percy and Annabeth would have mostly Percy/Poseidon-ish stuff, and maybe something from Annabeth/Athena.

Maybe black hair with dark green eyes and less trouble with school and yes, maybe a handful of water.

Powerwise, any sort of legacy would have little to no power, unless one of their parents had an excess of power. Then the half-blood's child would have powers of a normal demigod.

But, gods have no DNA or genes, thus complicating the issue.

But their children have inherited a thing or two from their parents.

So it's all one big mystery that we can only theorize about.