1. Phases of the Cell Cycle Interphase and Mitosis

2. Interphase G1 : Cell Grows G1 : Cell Grows S : DNA is copied (to produce a diploid # S : DNA is copied (to produce a diploid # of chromosomes. of chromosomes. G2: Cell nucleus prepares to divide G2: Cell nucleus prepares to divide The cell spends 90% of its time in interphase.

3. Figure of Interphase

4. Prophase Chromosomes coil and become visible. Chromosomes coil and become visible. Nuclear envelope disappears. Nuclear envelope disappears. Spindle fibers form from centrioles. Spindle fibers form from centrioles.

5. Figure of Prophase

6. Metaphase Chromosomes line up along the center of the cell. Chromosomes line up along the center of the cell. Spindle fibers attach to the centromere of each chromosome. Spindle fibers attach to the centromere of each chromosome.

7. Figure of Metaphase

8. Anaphase Centromeres divide. Centromeres divide. Sister chromatids move to opposite poles by way of spindle fibers. Sister chromatids move to opposite poles by way of spindle fibers.

9. Figure of Anaphase

10. Telophase Nuclear envelope reforms around chromosomes. Nuclear envelope reforms around chromosomes. Spindle fibers dissolve. Spindle fibers dissolve. 2 genetically identical haploid cells are produced. 2 genetically identical haploid cells are produced. Cytokinesis occurs : cytoplasm divides and cell membrane grows to enclose each cell. 2 cells result. Cytokinesis occurs : cytoplasm divides and cell membrane grows to enclose each cell. 2 cells result.

11. Figure of Telophase

12. Cytokinesis

13. Misconceptions Mitosis does produce 2 cells that are identical to the parent cell. Mitosis does produce 2 cells that are identical to the parent cell. The 2 daughter cells are haploid (n) in number of chromosomes after telophase, however, during interphase the DNA is copied to produce a diploid (2n) number of chromosomes. The 2 daughter cells are haploid (n) in number of chromosomes after telophase, however, during interphase the DNA is copied to produce a diploid (2n) number of chromosomes.

14. Misconceptions, cont. The Cell Cycle include Interphase, Prophase, Metaphase, Anaphase, & Telophase/Cytokinesis. Mitosis (m phase) includes Prophase, Metaphase, Anaphase, Telophase/Cytokinesis.