1. The nucleus of a cell contains chromosomes. Chromosomes carry genes.
Inside the nucleus
The nucleus of a cell contains chromosomes.
Chromosomes carry genes.
Genes code for proteins.
Genes are made from DNA.
Inside the nucleus

2. Inside the nucleus
Inside the nucleus

3. Inside the nucleus
Inside the nucleus

4. Chromosomes
Chromosomes

5. Each daughter cell has the diploid number of chromosomes.
Mitosis
Mitosis is a form of cell division which produces exact copies of cells.
Each daughter cell has the diploid number of chromosomes.
Mitosis

6. Mitosis
Mitosis

7. Mitosis
Mitosis

8. Mitosis
Mitosis

9. Each daughter cell has the haploid number of chromosomes.
Meiosis
Meiosis is a form of cell division which produces sex cells (e.g. sperm or egg cells).
Each daughter cell has the haploid number of chromosomes.
Meiosis

10. Meiosis
Meiosis

11. Meiosis
Meiosis

12. Meiosis
Meiosis

13. Mitosis and Meiosis
Mitosis and Meiosis

14. DNA strands are made from sugar, phosphate and bases
DNA contains coded information that determines inherited characteristics
DNA strands are made from sugar, phosphate and bases
There are four bases – A, C, T and G
DNA can replicate because base A and T always pair and C and G always pair.
3 bases code for one amino acid
Chromosomes and DNA

15. Nucleotides
Chromosomes

16. DNA
Chromosomes

17. DNA replication
Chromosomes

18. DNA bases
Chromosomes

19. Gametes are sex cells (e.g. sperm or egg cells)
Fertilisation
Gametes are sex cells (e.g. sperm or egg cells)
When male and female gametes join in fertilisation, a zygote is formed.
Fertilisation

20. Fertilisation
Fertilisation

21. Fertilisation
Fertilisation

22. Fertilisation
Fertilisation

23. Fertilisation
Fertilisation

24. Wordsearch
Wordsearch

25. Quiz
Quiz