mitosis and cell division.pptx

1. Starter
1. Decide if the 6 statements are based on SEXUAL or
ASEXUAL reproduction
2. Fill in clock A with your current knowledge on CELL
DIVISION (e.g. why do you think it happens?)
Challenge: list 3 organisms which reproduce by
a. SEXUAL and b. ASEXUAL reproduction
16/07/14
Mitosis and cell division
8m
1. To describe the difference between sexual and asexual
reproduction
2. To understand that mitosis produces genetically identical cells
3. To explain why cells divide by mitosis
4. Challenge today: to state the role of mitosis in growth and the
repair of damaged tissues

2. 1. To describe the difference between
sexual and asexual reproduction
2. To understand that mitosis produces
genetically identical cells
3. To explain why cells divide by mitosis
4. Challenge today: to state the role of
mitosis in growth and the repair of
damaged tissues
Learning outcomes
All (C)
Most (B)
Some (A-A*)
Key words:
diploid, cell division, mitosis, identical,
homologous, chromosomes

4. PEER assess → 1, 3, 5, 6 = SEXUAL
2, 4 = ASEXUAL
1. To describe the difference between sexual and asexual reproduction
1. Must produce and use gametes SEXUAL
2. The genetic information of the offspring is identical to
the parent ASEXUAL
3. Produces natural variation SEXUAL
4. Passes on all genetic problems of the mother ASEXUAL
5. 2 parents are required SEXUAL
6. Allows mutation to occur that powers natural selection
SEXUAL
Challenge:
A. SEXUAL (mammals, birds, reptiles)
B. ASEXUAL (yeast, bacteria, strawberries)

5. Activate
We are going to watch a short video on mitosis.
When watching, answer the 4Q on your sheet
1. What happens before a cell divides?
2. What happens to the nuclear membrane?
3. What happens to the chromosomes?
4. What is special about the two cells produced?
2. To understand that mitosis produces genetically identical cells
http://www.bbc.co.uk/learningzone/clips/cell-
division-by-mitosis-and-meiosis/6022.html
2. Fill in clock B with what you now know on MITOSIS AND
CELL DIVISION (e.g. mitosis produces identical daughter cells)

6. Self-assess
1. What happens before a cell divides? It makes a copy of
every chromosome’s DNA
2. What happens to the nuclear membrane? It dissolves
3. What happens to the chromosomes? They line up in the
centre of the cell. They then separate to opposite sides of
the cell. New nuclear membranes form and the cell begins
to divide.
4. What is special about the two cells produced? They are
genetically identical (and so can replace others that have died)
2. To understand that mitosis produces genetically identical cells
2. Fill in clock B with what you now know on MITOSIS AND
CELL DIVISION (e.g. mitosis produces identical daughter cells)

7. 3. To explain why cells divide by mitosis
Demonstrate
You are going to work in small teams and make a 3D
timeline on the stages of mitosis
Resources: pipe cleaners, A3 paper, diagrams,
card sort with jumbled up stages, extension Q,
Extend yourself: what could happen if mitosis goes wrong?
12m
Each group needs:
1. A timekeeper (who needs to collect the pack at the front)
2. A traffic light co-ordinator (R/Y/G)
3. A teacher link (can ask me 1Q)

8. 1. Parent cell
2. Chromosomes make
identical copies of
themselves
3. They line up along
the centre
4. The chromosomes
begin to move apart
5. The cell begins to
separate into two cells
6. Two daughter cells
form with identical
chromosomes to the
parent cell
3. To explain why cells
divide by mitosis
WWW?
EBI?

11. 1. To describe the difference between
sexual and asexual reproduction
2. To state the role of mitosis in growth,
repair of damaged tissues, and the
replacement of worn out cells
3. To explain why cells divide by mitosis
4. Challenge today: to state the role of mitosis in
growth and the repair of damaged tissues
Learning outcomes
All (C)
Most (B)
Some (A-A*)
4m
Challenge: use your knowledge to think about
‘MEIOSIS’ and compare the 2 types of cell division
Consolidate: update your clock with what you
NOW know about mitosis and cell division