HTTP 451. I never thought I'd see one of those before. I live in Canada... Not some authoritarian dictatorship. Wonder who blocked it.

Can the organism replicate the XY pairs during DNA replication (and pass it on to divided cells)? I haven't seen that mentioned, only that it "holds onto it for its entire lifespan" which is not clear to me.

There's also nothing about the interaction of these pairs with existing mechanisms, like transcription (DNA-->RNA) and translation (RNA-->protein). Could the new new pair increase the space of aminoacids from which proteins can be formed?