Ya, there's kind of a which came first, the chicken or the egg. To get more adoption we need the price to go up, but for the price to go up we need more adoption.
The Chicken.
(always the chicken)
The mutation happened during the "reception" of the animal (the first "chicken"), a animal that happened to lay eggs.
not-chicken-DNS + not chicken-DNS + randomized mutation-> chicken ---> first egg.
Please do not use "chicken and egg", because it can easily be answered.
OT, but it's not that easy
the egg came first if we're talking any old egg. there were plenty of egg-laying creatures long before there were ever any birds at all! if we're discussing chicken vs chicken-egg, we still run into a problem: is a chicken-egg an egg laid by a chicken, or an egg that contains a chicken? many are familiar with the evolutionary story of something not-chicken laying an egg that contains a chicken. but you seem to take for granted that a chicken egg must be laid by a chicken. the egg that contained the chicken does not count as the egg that preceded the chicken?
also, don't tell people not to use idiomatic phrases because they're not scientifically accurate that's not how language works at all.