1. Chapter 10-2: CELL CYCLE
HI!!!
M Phase

2. I. INTERPHASE(G1, S & G2) Cell Cycle begins here
The cell is NOT dividing
Has 3 phases
1. G1 Phase:
a. Cell is Growing
b. Proteins and Organelles synthesized
2. S Phase:
a. DNA is replicated
3. G2 Phase:
a. Centrioles replicate
b. Growth continues
c. Shortest phase

3. Interphase

4. II. M-Phase: Same as “cell division”
A. SOMATIC (body) cells are made
Includes 2 parts (that overlap)
Mitosis: Division of the nucleus of somatic cells.
Has 4 Phases (PMAT)
Cytokenisis: Division of the cytoplasm
Ends with 2 Cells

5. B. MITOSIS 1. Prophase Chromatin condenses to form chromosomes
Nuclear envelope/membrane disappears
Centrioles move to opposite poles
Spindle fibers are formed from centrioles
*** This step will be the opposite of Telophase.

6. Prophase

7. 2. METAPHASE Spindle fibers attach to centromeres of chromosomes.
b. Chromosomes line up in Middle (equator)

8. Metaphase

9. 3. ANAPHASE
Centromeres split allowing (twin)sister chromatids to separate
b. Chromosomes move Away from each other along the spindle fibers until they reach the centrioles at opposite poles
Cytokenisis begins

10. Anaphase

12. 4. TELOPHASE Spindle fibers disappear
b. Chromosomes uncoil back into chromatin
c. Two new nuclear envelopes reappear
***Mitosis (division of the nucleus) is complete
*** Telophase is OPPOSITE of Prophase!

13. Telophase

14. B. CYTOKINESIS: Second Stage of “Cell Division”(M-Phase)
Division of Cytoplasm
Cytokenisis in Animal Cells
Cytoplasm Splits
Cell membrane pinches inward
The resulting cells are called Daughter cell
Daughter cells are identical
Cytokenisis in Plant Cells same as animals EXCEPT:
Has a CELL PLATE which forms the cell wall

15. Cytokinesis- finished

17. PROPHASE
METAPHASE
INTERPHASE
USE
CHROMOSOME COLORS FROM YOUR BOOK!
TELOPHASE
ANAPHASE
CYTOKINESIS