What came first?
The Hen of course!
Genesis 1:25, ESV: "And God made the beasts of the earth according to their kinds and the livestock according to their kinds, and everything that creeps on the ground according to its kind. And God saw that it was good."
What makes eggs white vs. brown?
White eggs are laid by white-feathered chickens with white or light colored earlobes while the brown eggs are laid by brown-feathered chickens with red earlobes.