What is the difference between a chicken egg compared to where the baby develops?

Answer 1

A baby is developed in the mothers womb when an egg is fertilised by the sperm, the result is a zygote (fertilised egg). This single cell the divides until around eight cells are present an they begin to specialise, the embryo receives nutrients and oxygen from the mother via the umbilical cord. An embryo then turns into a foetus and a foetus into a baby, then birth ensues.

An egg is fertilised and then layed, the chicken embryo grows inside the egg and receives nutrients from the yolk, when it is grown it hatches, by breaking through the shell, often the mother will then look after the hatchling.

Answer 2

Both are eggs that can be used for food but what you refer to as a "food egg" is an unfertilized egg. These are the eggs you find at most grocery stores. The chickens who lay these eggs do not ever mate with a rooster. Farm fresh eggs bought in small country stores and roadside stands are often fertilized eggs but are not allowed to incubate. They are collected daily and refrigerated before any chick development takes place.