1. The Cell Cycle
Science 9 Lesson #6

2. Learning objective
To be able to describe, in sequence, the stages and features of the cell cycle, including mitosis and cytokinesis

4. Cell division is composed of two processes: mitosis and cytokinesis
Cell division is composed of two processes: mitosis and cytokinesis. Mitosis is the process that divides the nuclear material. Cytokinesis is the process that divides the cytoplasm and the rest of the organelles in half.

5. Mitosis and Cytokinesis

6. Cell carries out ‘normal’ functions Also…
Interphase
Cell carries out ‘normal’ functions
Also…
Growth
DNA Replication
Preparation for cell division

7. Prophase Chromosomes form X-shape with sister chromatids
Nucleolus disappears
Spindle fibers attach at centromeres stretched across cell by centrioles
Nuclear membrane disappears

8. Metaphase
Spindle fibers pull the chromosomes into a line across the equator

9. Anaphase
Spindle fibers pull sister chromatids apart and move to opposite poles of the cell

10. Telophase
Spindle fibers disappear
Nuclear membranes form around each set of chromosomes
Nucleolus appears in each nucleus

11. Cytokinesis Animal Cell:
Cell membrane pinches and divides organelles and cytoplasm
Plant cell
Cell plate forms along the center line
Organelles and cytoplasm are divided

15. Mitosis assignment Complete the handout on mitosis Choose one…
Make a cell cycle poster (including mitosis in full detail)

16. Worksheet Answers: ‘getting to know the cell cycle’
Three
Interphase, DNA
Mitosis
Cytokinesis, two
Four
Prophase, nucleolus
Metaphase, duplicated chromosomes
Anaphase, duplicated chromosomes
Telophase, nucleolus

17. Worksheet answers: ‘The cell cycle and mitosis’F A D B A B C D