What is the role of fertilization in triggering development?

Fertilization is the process where a sperm cell unites with an egg cell, resulting in the formation of a zygote. This event triggers a cascade of developmental processes, including the activation of the zygote's genome and the initiation of cell division. Additionally, fertilization establishes the genetic blueprint for the organism, guiding subsequent differentiation and growth. Overall, it serves as the critical starting point for embryonic development.