1. The division of the cell
Cell Cycle: Mitosis
The division of the cell

2. MITOSIS
PROPHASE
METAPHASE
ANAPHASE
TELOPHASEE
Fig a p. 171

3. Why Divide? Single celled organisms = reproduction Multicellular
Growth  while keeping the surface to volume ratio
To keep specialized cells in business.

4. Basically… (1855) Cells come from cells They divide Repair Growth
Produce offspring

5. Mitosis is asexual
So what is the difference between sexual and asexual reproduction?
Asexual = cell inherits all genetic info from one parent.
Sexual = Genetic material from both parents combines.
Which is the exact genetic copy of the parent?
What do your skin cells do?
Meiosis prepares for sexual.

6. Chromosomes
In each nucleus of a cell we find chromosomes. Chromosomes are responsible for carrying our genetic code. (DNA).
Lets look at the parts of a Chromosome.

7. Chromatin
Chromosomes
Sister Chromatids
Centromere

8. Cell Cycle Two phases in the cell cycle Interphase Longest phase
Increase in mass, doubles components, duplicates DNA
Mitosis
Nuclear division

9. Interphase Most of cell’s life is spent in interphase
Cell grows in size
Chromosomes are copied for cell division
Animal Cell

10. Mitosis: Prophase First and longest phase of mitosis
Chromatin coils up into visible chromosomes
Chromosomes are X shaped
Two halves are called sister chromatids
Held together by the centromere
Nuclear envelope breaks up
Animal Cell

11. Prophase

12. Mitosis: Metaphase Chromosomes line up across the middle of the cell
Sister chromatids are attached to to it’s own spindle fiber from opposite poles of the cell
Animal Cell

13. Metaphase

14. Mitosis: Anaphase
The sister chromatids separate and move to opposite sides of the cell
Animal Cell

15. Anaphase

16. Mitosis: Telophase Final phase of mitosis
Nuclear membranes form around the chromatids
The plasma membrane pinches together forming two new cells (cytokinesis)

17. Metaphase to Interphase

18. Interphase (Plant)

19. Prophase (Plant)

20. Metaphase (Plant)

21. Anaphase (Plant)

22. Telophase (Plant)