What happens during fertilization that makes the offspring unique from the original cells?

The union of an egg and sperm forming a zygote is known in biology as fertilization, during this process the zygote becomes a morula, meaning that the female reproductive cell divides after that union generating many other cells together into a solid ball of cells, giving rise to the embryo with the potential for development, fostered by chemical reactions among the sperm enzymes and the egg's plasma; mitosis and meiosis are included throughout the whole process.

Explanation:

positive reinforcement? ?

answer; how far out of place which the object finished relative to the starting location;