Yeah, but three genomes were produced, 2 were used and one was kept hidden. If the two were used on Shu then how does Yuu have a genome?
The daath are probably behind the meteorite, and the apocalypse. So if the boy is from this organization that started the apocalypse, then doesn't that mean that they have access to far more advanced technology, and can probably replicate the genome and what Shu's father did tenfold? I mean it was a meteorite so we can safely assume that they're aliens at the least, can't we? Although I'd be highly disappointed if they actually are.
Something may be wrong with my analogy and I thing that I heard somewhere in the show that there might have been 4 genomes, and that basically destroys my theory. But at the end of 19 Segai said that there were 3.
I deleted my comment forgetting that she kept the last genome hidden, and thought I was going insane,
.....