2. Have your body changed in the pass six months? Tall/Weight

3. Are you taller?

4. Did your hair grow?

5. Clip your toenails?

6. Broken a bone recently?

7. Wound – how does your body repair itself?

8. Mitosis
Definition: To create two identical daughter cells that are genetically identical to the parent cells

9. Q: What kind of cells would perform mitosis?
A: Somatic cells (all body cells except gamete cells)

10. Acronym for MITOSIS IPMAT (C) Interphase Prophase Metaphase Anaphase
Telophase
(Cytokinesis)

11. IPMAT (C)  IPMAN © Interphase Prophase Metaphase Anaphase Telophase
(Cytokinesis)

12. Homologous chromosome and sister chromatids
Chromosome in Mitosis
Homologous chromosome and sister chromatids

13. Anaphase Centromere splits and homologus chromosomes
go to opposite poles of cell

14. Interphase

15. Interphase Interphase is not part of mitosis
It involves synthesis of new organelles (G1), replication of chromosome (S) and synthesis of proteins necessary for mitosis (G2).
Chromosomes appears as thread-like structures called chromatin.

16. Prophase

17. Prophase
Chromatids (replicated chromosomes condense and become visible in a light microscope)
The nucleolus disappears
Paired centrioles (centrosomes) move opposite ends of the cell
Spindle forms
Asters (short microtubules radiating from centrioles) form

18. Metaphase

19. Metaphase Sister chromatids line up at the spindle equator
Each centromere attaches itself to the spindle fibre
At the end of metaphase, the centromeres divide.

20. Anaphase

21. Anaphase
The separated chromatids, now called chromosomes are pulled apart towards the opposite poles by the contraction of spindle fibres
Anaphase is completed when chromosomes arrive at the poles

22. Telophase

23. Telophase
Chromosomes reach the poles of the cell and cannot be seen clearly
The spindle fibres disappear and centrioles replicate
Nuclear membrane re-forms around chromosomes and the nucleolus reappears in each nucleus
Telophase may lead straight into cytokinesis

24. Cytokinesis
Cytokinesis is the separation of the parent cell’s cytoplasm at the end of a mitosis
Cytokinesis in animal and plant cells are different
In animal cell:
CLEAVAGE FURROW (division furrow)