1. How do you think this disorder occurred?
Brain Pop
How do you think this disorder occurred?

2. Mitosis

3. Cell Division: Mitosis
Dividing cells
Mitosis and the cell cycle
4 main stages of mitosis
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase

4. Chromosomes must be replicated before cell division.
Chromosome structure
Chromosomes must be replicated before cell division.
Sister chromatids:  two identical copies (chromatids) formed by the replication of a single chromosome

5. The replicated chromosomes stay together and are called sister chromatids
Sister chromatids are attached at the centromere.

7. The Cell Cycle: (1) Interphase
When a cell has not yet divided but is getting ready to- Interphase

8. (2) Prophase Chromosomes continue to condense Spindle fibers are made
Nuclear envelope dissolves

9. (3) Metaphase
Chromosomes are placed at the center of the cell

10. (4) Anaphase The centromeres separate
Spindle fibers pull sister chromatids apart toward the poles

11. (5) Telophase
Spindle fibers break down
Chromosomes begin to uncoil

12. (6) Cytokinesis
Usually occurs between late anaphase and end of telophase
Two ways….
Cell plate formation (plants)
Cleavage (animals)

13. Cytokinesis: Animal Cell13

14. Cytokinesis: Plant Cells14