1.

2. Four Mitotic Stages

Pro phase

Meta phase

Ana phase

Telo phase

3. Prophase 4. Steps in Prophase

DNA coils tightly & becomes visible as chromosomes

5. Prophase continued

2. Membrane around nucleus disappears

3. Nuceolus disappears

4. Centrioles migrate to poles

5. Spindle begins to form

* the job of the spindle is to attach to the middle of each chromosome and pull the chromatids apart

* (see next slide for image of spindle)

6. Mitotic Spindle 7. Eukaryotic Chromosome At the point in the center of the chromosome, labeled kinetochore, fibers attach in order to pull the two halves apart. 8. 9. Human Chromosomes 10. Steps in Metaphase

Spindle fibers from centrioles attach to each chromosome

Cell preparing to separate its chromosomes

Cell aligns its chromosomes in the middle of the cell

Remember: meta = middle

11. Metaphase Chromosomes lined up at the equator Asters at the poles Spindle Fibers 12. Metaphase 13. Steps in Anaphase

Cell chromosomes are separated

Spindle fibers shorten so chromosomes pulled to ends of cell

14. Anaphase 15. Anaphase Sister chromatids being separated 16. Steps in Telophase

Separation of chromosomes completed

Cell Plate forms (plants)

Cleavage furrow forms (animals)

Nucleus & nucleolus reform

Chromosomes uncoil

17. Telophase Plant Animal 18. Cytokinesis

Means division of cytoplasm and all organelles within

Occurs after chromosomes separate

Forms two, identical daughter cells

19. Cytokinesis Cell Plate Forming in Plant Cells 20. Cytokinesis Cleavage furrow in animal cell Cell plate in animal cell 21. Stages of M phase of cell cycle 22. Put the following in the correct order: