1. Cell Cycle
Events that occur from when a cell is made until it has divided into 2 new cells.
Mitosis
Nucleus splits
Interphase
Growth, synthesis, DNA replication
Cytokinesis
Cytoplasm splits into 2 cells

2. Chromatids
REMIND ABOUT TERM CHROMATID = when chromosomes replicated and joined by centromere

3. Mitosis video
Click here for video

4. Mitosis
4 Phases:-
Prophase
Metaphase
Anaphase
Telophase

5. Prophase
Chromatids condense (shorter and thicker)
Nuclear membrane disintegrates
Centrioles separate
Spindle starts to form from centrioles

6. Metaphase
Spindle has been formed
Chromatids attach to spindle by centromere
Chromatid pairs line up, in single file, along equator of cell

7. Anaphase Centromeres split into 2
Spindle fibres shorted to pull chromosomes to poles
Chromosomes pulled towards pole, centromere first

8. Telophase Spindle disintegrates
Nuclear membrane reforms (cell has 2 nuclei)

9. Key Words Chromatid - prophase Centromere - metaphase
Spinde fibres - anaphase
Equator - telophase
Nuclear envelope
poles

10. Mitosis Stage Chromosomes Other events Prophase
Consist of 2 chromatids joined by centromere
Condense (shorter and fatter)
Become visible
Nuclear envelope disintergrates
Centrioles at poles
Spindle starts to form
Metaphase
Still consist of 2 chromatids joined by centromere
Centromeres attach chromatid pairs to spindle fibres
Chromatid pairs line up along the equator of the cell
Spindle formed
Anaphase
Centromere holding chromatids splits to separate the chromatids (when split = chromosomes)
Chromosomes pulled to opposite poles by spindle fibres contracting
Pulled centromere first
Spindle fibres contract
Telophase
Become long and thin = not visible
Nuclear envelop forms around chromosomes at each end of cell
Spindle disintergrates

11. Mitosis

12. Interphase Prophase Metaphase Anaphase Telophase1

13. Interphase Prophase Metaphase Anaphase Telophase2

14. Interphase Prophase Metaphase Anaphase Telophase3

15. Interphase Prophase Metaphase Anaphase Telophase4

16. Interphase Prophase Metaphase Anaphase Telophase5

17. Interphase Prophase Metaphase Anaphase Telophase6

18. Interphase Prophase Metaphase Anaphase Telophase7

19. Answers

20. Interphase Prophase Metaphase Anaphase Telophase1

21. Interphase Prophase Metaphase Anaphase Telophase2

22. Interphase Prophase Metaphase Anaphase Telophase3

23. Interphase Prophase Metaphase Anaphase Telophase4

24. Interphase Prophase Metaphase Anaphase Telophase5

25. Interphase Prophase Metaphase Anaphase Telophase6

26. Interphase Prophase Metaphase Anaphase Telophase7

27. Cell division – label as many things as possible

28. Write a poem following the rules below. Your first word is “MITOSIS”
Task
Write a poem following the rules below. Your first word is “MITOSIS”
One word for the idea
e.g. school
Two words to explain the meaning of the idea
e.g. learn things
Three words to describe what the idea does
e.g. educate and train
Four words to explain what the idea means to you
e.g. interesting and fun activities
One final word for the idea
e.g. education

29. Feature Mitosis Meiosis
Number of divisions 1 2
Number of daughter cells 4
Diploid or haploid cells produced?
Diploid
Haploid
How do chromatid pairs line up for first division
Single file
In homologous pairs (as bivalents
What is split in first division
Chromatid pairs
Chromosome pairs
Variation in daughter cells?
No (unless mutation)
Yes

30. Feature Mitosis Meiosis
Number of divisions
Number of daughter cells
Diploid or haploid cells produced?
How do chromatid pairs line up for first division
What is split in first division
Variation in daughter cells?