KS3 Science Revision

1. Name 3 types of continuous varitaion

2. Sam and Dan are identical twins but Sam's hair is brown and Dan's is blonde. Why might this be?

3. How many chromosones are found is sperm?

4. A father has brown eyes and the genotype Bb. A mother has blue eyes and the genotype bb. What are the chances of having a child with brown eyes?

5. Why might a farmer want to slectivly breed a sheep?

6. What type of variation are eye colour?

7. A mouse has 40 chromosones in his body. How many would you expect to find in one egg?

8. What would be the dominant gene out of black hair and blonde hair?

9. Where are chromosones found?