Fertilization is the remarkable moment when a sperm cell successfully penetrates an egg cell, combining genetic material from both parents to form a unique diploid zygote. This process marks the beginning of human development and the formation of a genetically distinct individual.
đŦ Key Processes
Sperm penetrates egg's protective layers
Nuclei fuse to form diploid zygote
Cortical reaction prevents polyspermy
First mitotic division begins development
Amazing Process!
Of the 200-500 million sperm released during fertilization, only one will successfully fertilize the egg. The journey from fertilization to implantation takes about 6-7 days!
đ¯ Learning Objectives
Understand the biological processes of fertilization and how genetic material from two parents combines to create a unique individual.