Warm-Up
What are the 5 things characteristics of a living organism?
What are the labelled parts of this cell that you see?
What do they do?
1.
2.
3.

Cells Divide for 3 reasons
1. Repair injuries by replacing old cells to organism.
2. Growth of organism
3. Reproduce: Sexually or asexually

Cell Cycle
Stages through which a cell passes as it grows and divides
There are 3 stages:
1. Interphase
2. Mitosis - PMAT
3. Cytokinesis

Stage 1: Interphase
• Longest stage
• Cell grows in size and DNA chromosomes are copied (sister chromatids appear)

Stage 2: Mitosis
• The 2 copies of DNA move apart and make
2 new nuclei in the cell.
• Mitosis is broken into 4 phases: P.M.A.T.

Phase 1: P MAT
Prophase
• Chromosomes thicken and become visible
• Nucleus starts to dissolve
• Add in drawing

Phase 2: P M AT
Metaphase
• Chromosomes meet in middle of cell
• Add in drawing

Phase 3: P M A T
Anaphase
• Chromatids separate to opposite sides of cell
• Add in drawing
Individual chromosomes

Phase 4: P M A T
Telophase
• Chromosomes stretch out and become invisible
• Nucleus starts to form
• Add in drawing

Stage 3: Cytokinesis
• The cell membrane pinches to off to form
2 new cells.
• 2 identical cells are formed
•
46 chromosomes in humans

Cytokinesis in Plants
In plants, a structure known as the cell plate forms midway between the divided nuclei.
Cell plate Cell wall
The cell plate gradually develops into a separating membrane.
A cell wall then begins to appear in the cell plate.

Cell Cycle
Interphase
Mitosis - PMAT
Cytokinesis

10-2
The series of events that cells go through as they grow and divide is called a. the cell cycle.
b. mitosis.
c. interphase.
d. cytokinesis.
Copyright Pearson Prentice Hall

10-2
The phase of mitosis during which the chromosomes line up across the center of the cell is a. prophase.
b. metaphase.
c. anaphase.
d. telophase.
Copyright Pearson Prentice Hall

10-2
During mitosis, “sister” chromatids separate from one another during a. telophase.
b. interphase.
c. anaphase.
d. metaphase.
Copyright Pearson Prentice Hall

To do now: Micro viewers
Complete micro viewer worksheet on the stages of mitosis.