1. Types of variation

2. Inherited variation Eye colour is an example of inherited variation.
These features are caused by genes.
They cannot be changed by anything in the environment.

3. Environmental variation
Having pierced ears or a tattoo is an example of environmental variation.
These features are not caused by genes.
They can be different in individuals with identical genes.

4. Variation influenced by both genes and the environment
An example of this type of variation is how good you are at dancing or sport.
These features show inherited variation but can be influenced by your environment too.

5. Arm folded on top – left or right?

6. Hair line

7. Leaf size

8. Ear lobes

9. Blood group

10. Skin colour

11. Hair colour

12. Language

13. Height

14. Body mass

15. Exam success

16. 100 metre sprint time

17. Iris pattern

18. Tree height

19. Scars

20. Flexibility

21. Hair texture

22. Heart rate