1. The Cell Cycle (cell division)

2. Identical Daughter Cells
Two identical daughter cells
Parent Cell

3. Daughter Cells of Mitosis
Have the same number of chromosomes as each other and as the parent cell from which they were formed
Identical to each other, but smaller than parent cell
Must grow in size to become mature cells (G1 of Interphase)

4. Five Phases of the Cell Cycle
G1 - primary growth phase
S – synthesis; DNA replicated
G2 - secondary growth phase
collectively these 3 stages are called interphase
M - mitosis
C - cytokinesis

5. Cell Cycle

6. What’s Happening in Interphase?
What the cell looks like
Animal Cell
What’s occurring

7. DNA and Replication

8. DNA Structure Pentose Sugar Sugars are numbered clockwise 1’ to 5’ CH2
(deoxyribose)

9. Antiparallel Strands One strand of DNA goes from 5’ to 3’ (sugars)
The other strand is opposite in direction going 3’ to 5’ (sugars)

10. Direction of Replication
DNA Replication
DNA polymerase can only add nucleotides to the 3’ end of the DNA
This causes the NEW strand to be built in a 5’ to 3’ direction
RNA
Primer
DNA Polymerase
Nucleotide 5’ 3’
Direction of Replication

11.
Replication Animation

12. Four Mitotic Stages
Prophase
Metaphase
Anaphase
Telophase

13. What the cell looks like
Review of Prophase
What the cell looks like
What’s happening

14. What the cell looks like
Review of Metaphase
What the cell looks like
What’s occurring

15. Comparison of Anaphase & Telophase

16. Cleavage furrow in animal cell Cell plate in plant cell
Cytokinesis
Cleavage furrow in animal cell
Cell plate in plant cell

17. Mitotic Stages

18. CELL CYCLE REGULATION
p53 gene
“Trigger” proteins (U-proteins)
Cyclins

19. Uncontrolled Mitosis Cancer cells
If mitosis is not controlled, unlimited cell division occurs causing cancerous tumors
Oncogenes are proteins that increase the chance that a normal cell develops into a tumor cell
Cancer cells

20. Cell Division in Prokaryotes

21. Cell Division in Prokaryotes
Prokaryotes such as bacteria divide into 2 identical cells by the process of binary fission
Single chromosome makes a copy of itself
Cell wall forms between the chromosomes dividing the cell
Parent cell
Chromosome relicates
Cell splits
2 identical daughter cells

22. Review of Mitosis

23. Eukaryotic Cell Division
Used for growth and repair
Produce two new cells identical to the original cell
Chromosomes during Metaphase of mitosis
Cytokinesis
Anaphase
Prophase
Metaphase
Telophase

24. Name the Mitotic Stages:
Interphase
Name this?
Prophase
Telophase
Name this?
Metaphase
Anaphase

25. Name each stage as you see it occur?
Mitosis Animation
Name each stage as you see it occur?

26. Mitosis in Onion Root Tips
Do you see any stages of mitosis?

27. Draw & Learn these Stages

28. Draw & Learn these Stages

29. Test Yourself over Mitosis

30. Mitosis Quiz

31. Mitosis Quiz

32. Name the Stages of Mitosis:
Early prophase
Early Anaphase
Metaphase
Interphase
Early Telophase,
Begin cytokinesis
Late Prophase
Late telophase,
Advanced cytokinesis
Mid-Prophase
Late Anaphase

33. Early, Middle, & Late Prophase Telophase & Cytokinesis
Identify the Stages ?
Early, Middle, & Late Prophase ? ? ?
Metaphase
Anaphase
Late Prophase ? ? ?
Telophase & Cytokinesis
Late Anaphase
Telophase

34. Locate the Four Mitotic Stages in Plants
Anaphase
Telophase
Metaphase
Prophase