1. The Cell Cycle

2. G1 Phase
Cellular growth & activity

3. S Phase DNA (chromosome) replication takes place
1 chromosome becomes a pair of “sister chromatids”

4. G2 Phase Final preparations for cell division
Synthesis of organelles and materials

5. M Phase
Period of time when mitosis takes place

6. Mitosis is the process by which the nucleus of the cell is divided into 2 nuclei, each with the same number and kinds of chromosomes as the parent cell.

7. Cytokinesis is the process by which the cytoplasm divides, thus forming 2 distinct cells.

8. Phases of Mitosis

9. Prophase
a) Tighter coiling of the chromosomes - sister chromatids (chromosome) become visible as the chromatin condenses
b) Centrioles separate

10. c) Spindle – consists of microtubules
Originate from the centrioles and attach to the centromere of each chromatid
d) Nucleolus disappears and the nuclear envelope breaks down

11. Metaphase
Chromosomes line up across the equator (middle) of the cell

12. Anaphase a) Spindles pull apart the sister chromatids
b) The 2 identical chromosomes move toward the opposite poles of the cell

13. Telophase Chromosomes begin to uncoil (decondense) into chromatin
Nuclear envelope re-forms around the chromatin & the nucleolus becomes visible
Cytokinesis begins to divide the cytoplasm