It simply does not require a change in genes to stop teeth from growing. DNA methylation, which does not itself change the genome ~ not even to transpose a basepair ~ can do the trick all by itself.
It simply does not require a change in genes to stop teeth from growing. DNA methylation, which does not itself change the genome ~ not even to transpose a basepair ~ can do the trick all by itself.
That's fine, but why and how did the methylation change in actual birds? Are you saying it was not due to some other change in the DNA? I'm not talking about what goes on in the lab, but what went on in the wild.
But in any case, all this is beside the point. Darwinism (and indeed evolution) isn't tied to genetics, obviously: Darwin knew nothing of genetics. All that is required is an inherited change. As you say, all birds expressed teeth at one time. As you know, no birds express teeth today (except under extremely special conditions). That's an inherited change (genetic or not). Evolution by definition.