1. Chapter 3: Cell Division
3.1 Cell division occurs in all organisms
3.2 Cell division is part of the cell cycle
4.3 Meiosis is a special form of cell division
Before, you learned:
-cells come from other cells through cell division
-a cell must have a full set of genetic material to function
-cell division enables multicellular organisms to develop, grow, and repair themselves
Now, you will learn:
-about two main stages in the cell cycle
-about the changes that occur in cells before mitosis
-about the events that take place during mitosis

2. Mitosis animation/video:
Activity:

3. 3.2 Cell division is part of the cell cycle

5. Cycles Life cycle, Carbon cycle, Water cycle Cell Cycle
Cycles: regularly repeats
Cell Cycle
The normal sequence of development and division of a cell
Includes:
Interphase – cell carries out its functions
Cell division – cell divides
Only eukaryotes undergo mitosis

6. Interphase Part of the cell cycle that the cell is NOT dividing
Cell grows to twice its original size
Normal cell activities: transporting materials in and wastes out, cellular respiration (provides energy)
Prepare for cell division
Duplicated DNA exactly
During most of Interphase, DNA is in chromatin form

7. Cell Division Phase Mitosis: nucleus divides
Prokaryotes do not undergo mitosis because they have only one chromosome and no nucleus
To move the DNA and other material in the parent cell into position for cell division
When the cell divides, each new cell gets a full set of DNA and other cell structures
Cytokinesis: division of the parent cell’s cytoplasm – immediately after mitosis
Results in two genetically identical daughter cells

8. Cell division produces two genetically identical cells
New cells help your body to grow, develop, and repair
Body cells divide at different rates, but the same process (mitosis) divides their genetic material

9. Mitosis
Prophase: the DNA in the nucleus forms chromosomes, consist of two identical chromatids held together by a centromere
Metaphase: chromosomes line up in the middle of the cell
Anaphase: chromosomes/chromatids separate forming two chromosomes, which are pulled to opposite sides of the cell
Telophase: nuclei form around each group of chromosomes

10. Cytokinesis Division of the parent cell’s cytoplasm
In animal cells: a fiber ring forms in the center of the dividing cell, it contracts and pulls the cell membrane inwards – two daughter cells
In plant cells: the cell wall prevents the cell membrane from being pulled inward. A cell plate grows between the two new nuclei

14. Mitosis and Cytokinesis
Mitosis and Cytokinesis

15. 3.2 Cell division is part of the cell cycle
Name and draw each stage of mitosis.