1. Genes Traffic lights quiz Hold up the coloured card that matches the correct answer you see on the screen

2. Which is the smallest? DNA Chromosome Gene 1 3 21

3. Which is the smallest? Gene 1 3 21

4. How many chromosomes do humans have? 22 pairs 23 pairs 33 pairs 2 3 21

5. How many chromosomes do humans have? 23 pairs 2 3 21

6. What are genes? Long lines of DNA that codes for all of our characteristics Short lines of DNA that code for one characteristic Found in the cytoplasm 3 3 21

7. What are genes? Short lines of DNA that code for one characteristic 3 3 21

8. How many alleles of the same gene do we have? 123123 4 3 21

9. 2 4 3 21

10. DNA is found in: The cytoplasm The cell membrane The nucleus 5 3 21

11. DNA is found in: The nucleus 5 3 21

12. Genotype is: The characteristic e.g. eye colour The combination of alleles The protein that is made by the gene 6 3 21

13. Genotype is: The combination of alleles 6 3 21

14. Phenotype is: 7 3 21 The characteristic e.g. eye colour The combination of alleles The protein that is made by the gene

15. Phenotype is: 7 3 21 The characteristic e.g. eye colour

16. A dominant allele will Show when you only have one copy of it Show only when you have 2 copies of it Only show in the next generation 8 3 21

17. A dominant allele will Show when you only have one copy of it 8 3 21

18. Which one is the homozygous genotype? Bb bB BB 9 3 21

19. Which one is the homozygous genotype? BB 9 3 21

20. If b is the recessive allele and codes for blue eyes, which of these genotypes will produce blue eyes? BB bb Bb 10 3 21

21. If b is the recessive allele and codes for blue eyes, which of these genotypes will produce blue eyes? bb 10 3 21