Describe The Process Of Fertilisation And Implantation

Question 1

What are the 6 stages of fertilisation?

Answer 1

1. Sperm makes contact with egg
2. Acrosome reacts with zona pellucida (glycoprotein layer between corona radiates and oocyte membrane)
3. Acrosome reacts with the next layer - perivitelline space
4. Plasma membranes of sperm and oocyte fuse
5. Sperm nucleus enters oocyte
6. Cortical granules fuse the oocyte plasma membrane, which renders the Vitelline layers impenetrable to sperm. Ganges fuse and become a zygote.