1. Activity #44 PHASES OF THE CELL CYCLE

2. 6 Phases of the Cell Cycle
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis

3. 1. Interphase
The cell doubles in size
DNA Replicates
Longest phase

4. 1. Interphase
Chromatin
Nuclear Membrane

5. The process of the cell’s nucleus dividing during Prophase-Telophase
Mitosis
Mitosis is subdivided into four phases: Prophase, Metaphase, Anaphase, and Telophase
The process of the cell’s nucleus dividing during Prophase-Telophase

6. 2. Prophase Mitosis begins (nucleus divides). Centrioles appear
Spindle fibers form.
Chromatin forms Chromosomes
***Each chromosome consists of two sister chromatids attached together by a centromere by the end of this stage.
-chromatid = half of a copied chromosome

7. 2. Prophase
Centrioles
Spindle fibers
Nuclear Membrane

8. 3. Metaphase centrioles Spindle fibers Chromosome
Nuclear membrane has disappeared.
Chromosomes line up along the middle of the cell.
Spindle fibers attach to centromeres of each chromosome.
centrioles
Spindle fibers
Chromosome

9. 4. Anaphase Spindle fibers centrioles Chromosomes Chromatids split
Spindle fibers pull chromosomes to opposite ends of the cell.

10. 5. Telophase centrioles Spindle fibers Nuclei Chromosome
Two new nuclei form
around chromosomes
Chromosomes return to chromatin form.
Mitosis ends. (nucleus has been divided)

11. 6. Cytokinesis
Cell membrane pinches and forms identical daughter cells
After cytokinesis, interphase begins again.

12. Cell doubles in size; DNA is copied
Cell Cycle Phases
Stage
Name
Process 1
Interphase
Cell doubles in size; DNA is copied
Mitosis
The process of the cell’s nucleus dividing during prophase-telophase
Prophase
Mitosis begins; nuclear membrane disappears 2
Metaphase
Chromosomes line up along the equator of the cell 3
Anaphase
Chromatids split and are pulled to each pole of cell 4
Telophase
Nuclear membrane reforms; cell begins to pinch together. Mitosis ends 5
Cytokinesis
Parent cell’s cytoplasm divides, forming 2 identical daughter cells 6

14. Videos