Question

who came first egg or hen????

Answer 1

it was a great controversy but some scientist groud claimed that the egg came first by experiment and Dana research

Answer 2

egg came first as Prior to the first true chicken, there were non-chickens. The DNA changes came about in cells housed in the egg. So the egg came first. In July 2010,British scientists, using a supercomputer, claimed to have come up with the final and definitive answer.
in short we can say that ;
two genes of different characters reproduce as a result a egg produced