Gametes

Question 1

How is a zygote produced?

Answer 1

The fusion of two gametes (a sperm and an egg cell), during the process of fertilisation.

Question 2

Describe the structure of an egg cell.

Answer 2

1. Nucleus containing 23 chromosomes (haploid)
2. Cell membrane
3. Zone pelluida- protective glycoprotein layer that sperm have to enter
4. Follicle cells around outside of cell to form a protective coating

Question 3

Describe the structure of a sperm cell.

Answer 3

1. Nucleus containing 23 chromosomes (haploid)
2. Acrosome containing digestive (hydrolytic) enzymes to break down the zone pellucida
3. Cell membrane
4. Midsection contains mitochondria to provide energy (ATP) for tail movement
5. Flagellum allows sperm to swim towards egg