A chicken and an egg were lying in bed. The chicken was smiling and smoking a cigarette while the egg looked decidedly miserable. The egg muttered 'well, I guess we answered that question.' (Sorry, couldn't resist!)
Nah, boognish76 has got it. Through evolution, something eventually came to be 99.99% chicken (what we would now classify as a chicken) - but was not completely a "chicken". But it layed an egg and inside that egg was what would be classified as 100% chicken. Hence the egg came first, with the chicken in it. It's boring once you know the answer.
Don't be so naive IndieSinger. What if the animal that a chicken evolved from was not egg-laying, thus evolving into what we now refer to as a chicken, which then went on to lay eggs? That would mean the chicken came first.
Erm...through Mitosis; one cell multiplied, which evolved, into an egg laying being, which eventually turned into a chicken. So; neither. The cell came first.