1. Cell Cycle
The cell cycle describes the cell’s activities in the state of
non-division (interphase)
and division (mitosis).
(cells can only come from cells)

2. Interphase Cell builds up store of energy Organelles are duplicated
DNA replicates just before mitosis starts (individual chromosomes not visible)

3. The four phases of mitosis are
prophase
metaphase
anaphase
telophase

4. Prophase The chromosomes become visible.
(short, thick and duplicated).
Centrioles move to opposite poles.
Spindle fibres start to form.
Nuclear membrane dissolves.

5. Metaphase Chromosomes line up along the equator Chromosomes connected
Middle
Chromosomes line up along the equator
Chromosomes connected
from centromere
to both centrioles
by the spindle fibres

6. Anaphase Centromere splits Spindle fibres contract
Apart
Centromere splits
Spindle fibres contract
Chromosomes separate and are pulled to opposite poles

7. Telophase Nuclear membrane re-forms around each set of chromosomes
Two
Nuclear membrane re-forms around each set of chromosomes
Chromosomes no longer visible now called chromatin.
Spindle dissolves.

8. Cytokinesis Division of cytoplasm
Cleavage furrow formation in animal cells
Cell plate formation in plant cells.

9. In Unicellular Organisms =Reproduction In Multicellular Organisms
=Growth
Produces new cells, not new individuals
Responsible for growth & renewal and repair of cells

10. Mitosis Type of cell division 2 identical daughter cells produced
No change in chromosome number
Occurs in somatic (body) cells
No variation

11. Cancer Uncontrolled cell division -cells divide too fast and too often
No control of mitosis
Cells don’t stop dividing when they should
(usually when in contact with other cells)
Caused by – uv radiation, cigarette smoke

12. Arrange in correct order

13. Do I know…. the stage when the cell is not dividing
the 4 stages of mitosis
the events of prophase
the events of metaphase
the events of anaphase
the events of telophase

14. Do I know…. how the cytoplasm divides in animal cells
how the cytoplasm divides in plant cells
the function of mitosis in single celled organisms
the functions of mitosis in multi-celled organisms

16. Next haploid/diploid meiosis (descrp & diffs and functions) chromosome
Contemporary Issues & Technology
Tissue culture:
Explanation: a technique in which individual cells are grown and divide in a bath of sterile nutritive fluid which
often contains hormones and growth substances.
Reference to any two applications: cancer research, plant breeding, routine analysis of chromosome karyotypes.