1. Sexual/asexual reproduction
Thursday 18th February
Sexual/asexual reproduction

2. Introduction
Sexual reproduction produces offspring using sex cells – e.g sperm and egg in animals or pollen and egg in plants
Asexual reproduction produces identical offspring (clones) without the use of sex cells – just by cell division.

3. Introduction
Sexual reproduction can differ in different animals in terms of location of fertilisation , deveopment and parental care.
Some animals fertilise internally eg humans and some externally e.g fish

4. Human fertilisation

5. Fertilisation in Humans
Sperm
Egg

6. Sexual reproduction – sex cells

7. Fertilisation in fish

8. Asexual reproduction - amoeba

9. Asexual reproduction -cuttings

10. Cloning in Humans – asexual

11. Fertilisation in Animals
Fertilisation in animals can happen either INTERNALLY or EXTERNALLY. Some examples:
External
Internal
Lots of eggs produced
Many eggs go unfertilised
Small number survive
Fewer eggs produced
More eggs fertilised
Greater chance of survival

12. Task:
Produce a leaflet for a zoo describing the differences in reproduction in different animals