1. Cell Division
The Life of a Cell

2. Vocabulary Terms for Mitosis
Asexual Reproduction – new organism is formed from one parent cell
Mitosis - cell division that ensures that each daughter cell gets an exact copy of the mother cells DNA
Cytokinesis - division of the cytoplasm during cell division
Chromosomes -A doubled rod of condensed chromatin

3. Chromatid - one half of a duplicated chromosome
Centromere - area where the chromatids of a chromosome are attached
Chromatin - granular material visible within the nucleus; consists of DNA.
Spindle - a network of microtubules that forms during mitosis and moves chromatids to the poles
Cell Equator - this is where chromosomes pair up and attach to the spindle

4. Before we begin, we must learn about chromosomes.

5. Chromosomes Humans have 46 chromosomes in their cells.
Carry the material for your characteristics
One chromosome has 2 chromatids
Held together by a centromere

7. Cornell Notes
To increase the number of cells so multicellular organisms can grow!
The steps from one cell division to the next.
What is the purpose for cell division?
Define Cell Cycle

8. All cells must:
Form - Develop
Grow - Die
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
What do cells do in their life cycle?
List the steps of the cell cycle.

9. Interphase (not part of Mitosis)
Where the cell spend most of its life growing
G1: normal cellular functions occur, cell grows
S: DNA replicates, 2 copies of each chromosome
G2: cell prepares for Mitosis, centrioles split
Explain the stages of interphase

10. Centrioles

12. Prophase Analyze what occurs during Prophase in Mitosis
Chromosomes are visable
Sister chromatids form
Nuclear envelope disappears
Spindle fibers form from centrioles
Centrioles move to opposite endes of cell
Analyze what occurs during Prophase in Mitosis

15. Analyze what occurs during Metaphase in Mitosis
Double-stranded chromosomes line up in the middle (equator)
Spindle fibers attach to sister chomatids at the centromere.

18. Anaphase
Each centromere divides as sister chromatids are pulled to opposite sides of the cell.

20. Telophase Chromosomes reach opposite sides Nuclear envelope forms
Chromosomes uncoil
Spindle fibers disappear

22. Cytokinesis Division of the cytoplasm
2 genetically identical cells form
“Daughter” cells
In animal cells, the cell membrane pinches in the middle
In plant cells, a cell plate forms

25. Videos
(mitosis dance)