Which came first? The chicken or the egg?

Please note that this is a bit simplified, since it’s doubtful that the distinction between a red jungle fowl and a chicken came about in just one generation. More likely, there were quite a few generations of a long grey area between sorta-a-red-jungle-fowl-sorta-a-chicken before it became obviously the distinct species we now call a chicken.  Plus, they think they might have bred them with the grey jungle fowl as well.

Dammit, Jim, I’m an illustrator, not a biologist.

Either way, the egg still came first.