User blog comment:The River Styx/Family Reunion! With our characters/@comment-1897744-20100320035226

Exxxaaactly. They would all carry the genetics of their mortal parents and would, presumably, only have those genetic chromosomal markers. GAH. Reason number eleventy why I dislike the series.

(Though, at Kiwi's point, even if you're not looking from a biblical standpoint unless you marry someone of absolute different native background -- say, you're 100% Asian and they're 100% African -- the odds that, going way back, you're not related, are pretty slim.)