Here's why:
* The zygote is the first cell of a new organism. It forms when a sperm cell fertilizes an egg cell.
* It carries the complete genetic blueprint. This blueprint, contained in the DNA within the zygote's nucleus, holds all the instructions needed for building and maintaining a human body.
* It has the potential to develop into any cell type in the body. This is because the zygote is totipotent, meaning it has the potential to become any cell type.
While other cells in the body have the same DNA as the zygote, they are specialized and cannot develop into a complete organism.
