1. 9.2 MITOSIS and CYTOKINESIS
MAIN IDEA:
Eukaryotic cells reproduce by MITOSIS and CYTOKINESIS
WHAT YOU WILL LEARN
-The events of each stage of mitosis
-The process of cytokinesis

2. READING Q’s
NAME
-What is one function of mitosis in a multicellular organism?
-repair damaged cells
-create new cells for growth / replacement

3. READING Q’s ANAPHASE LABEL
-circle the picture that shows the sister chromatids being pulled to opposite ends of the cell
ANAPHASE

4. IDENTIFY -How are sister chromatids attached? -centromeres
READING Q’s
IDENTIFY
-How are sister chromatids attached?
-centromeres

5. READING Q’s DESCRIBE -What happens to the chromatids during metaphase?
-they line up along the equator of the cell

6. READING Q’s
IDENTIFY
-What does the cell still need to do at the end of telophase?
-cytoplasm divides--cytokinesis

7. READING Q’s
NAME
-The cell structure that pinches the cytoplasm in half.
animals -microtubules
plants -cell plate

8. READING Q’s
IDENTIFY
-What features in the figure can you use to identify this cell as a plant cell?
-cell wall: cell dividing by forming a cell plate

9. P –prepare/poles/pulling M –middle A –apart/away T –two/twin nuclei
READING Q’s
CREATE a “memory devise” to help you remember events that occur in each stage of MITOSIS by using the initials --
P –prepare/poles/pulling
M –middle
A –apart/away
T –two/twin nuclei
MITOSIS SONG

10. GROUP WORK: APPLICATION NOTES
-COMPLETE application notes using GROUP knowledge/discussion from reading.

11. REVIEW VOCABULARY DEFINE: life cycle
-growth / development stages an organism goes through during its life

12. MITOSIS IDENTIFY: two functions of mitosis in animals
1-___________________ 2-__________________
repair damaged cells
growth of organism

13. DESRCIBE: the stages of MITOSIS and the process of CYTOKINESIS
NAME OF PHASE
DESCRIPTION (bulleted)
 prophase
(PREPARATION)
 metaphase
(MIDDLE)
 Anaphase
(APART/AWAY)
 telophase
(TWIN NUCLEI)
 cytokinesis
(CELLS CUT)
-nuclear membrane/nucleolus disappear
-spindle apparatus forms from centrioles
-chromatin coils to form chromosome
-chromosomes move to equator of the cell
-centromeres spilt
-sister chromatids pulled opposite sides
-2 new nuclei formed -double membrane begins to form btwn them
-cell’s cytoplasm divides/separates into 2 new identical cells

14. MITOSIS LABEL: -the diagram of the stages of mitosis #13-16
-the structures pointed to using #17-20
METAPHASE
ANAPHASE
TELOPHASE
PROPHASE G2
sister chromatid
centromere
spindle fibers
centrioles

15. MITOSIS SUMMARIZE: The function of each structure in mitosis
centromere-__________________________
microtubules-__________________________
spindle fibers-__________________________
motor proteins-__________________________
part of chromosome spindle fibers attach to—PROPHASE/METAPHASE
tube-like structure/shorten & pull chromosome to opposite poles of cell--ANAPHASE
attach and move chromosomes to middle of cell--METAPHASE
help microtubules pull chromosomes to poles of cell--ANAPHASE

16. MITOSIS TRUE/FALSE: T T F anaphase T T F telophase F
_____1- The nuclear membrane disintegrates during prophase.
_____2-Microtubules move chromatids to the poles of the cell during anaphase.
_____3-Chromosomes reach the poles of the cell during metaphase.
_____4-The cell’s chromatin condenses into chromosomes during prophase.
_____5-Chromosomes attach to spindle fibers & line up along the equator of the cell during
metaphase.
_____6-the nucleus reappears during prophase.
_____7-Centrioles are pulled apart during anaphase.
_____8-Chromatids are pulled apart during anaphase.
_____9-The shortest stage of mitosis is metaphase.
_____10-The chromosomse decondense or unwind during telophase. T F
anaphase T T F
telophase F
sister chromatids T T T

17. COMPARE/CONTRAST: Cytokinesis in plant AND animal cells
-result in genetically identical daughter cells
-CELL PLATE forms–
-new cell wall between daughter cells
-CLEAVAGE FURROW forms-
-microfilaments constrict dividing cell -- PINCH into 2 new daughter cells
-most of
life exist as
chromatin
-w/o proper DNA cell
doesn’t survive
*accurately passed on
-before division
appear as short
stringy structures
in nucleus

18. Using a concept map, STAGES OF THE CELL CYCLE
SUMMARIZE
Using a concept map, STAGES OF THE CELL CYCLE
interphase
MITOSIS
cytokinesis
GAP-1
prophase
synthesis
metaphase
GAP-2
anaphase
telophase

19. -cell
-cytoplasm
-nuclear membrane
-metaphase
-nucleoli
-poles