Can a chicken develop in an unfertilized egg?

No, a chicken cannot develop in an unfertilized egg.

Here's why:

* Fertilization is essential: For a chicken to develop, the egg must be fertilized by a rooster's sperm. This fertilization triggers the development of the embryo.

* Unfertilized eggs contain only yolk: Unfertilized eggs contain the yolk, which provides nutrients for the developing embryo. However, without the genetic material from the sperm, there's no blueprint for the embryo to develop.

* No cell division: Without fertilization, there is no trigger for cell division to occur, which is essential for the formation of tissues and organs in the developing embryo.

Therefore, an unfertilized egg will only grow larger as the yolk is deposited, but it will not develop into a chicken.