Starter

1
Starter

• On a post it draw a circle
• This is to represent the cell cycle
• Shade the of it that you think is taken up by
  mitosis
• Stick onto the white board

2
How did you do?
3
Learning objectives

• Recall the stages in the mitotic cell cycle
• Describe the key features of each stage of
  mitosis
• Identify the stage of mitosis in electron
  micrographs

4
I pee on the mat c

• Interphase
• Prophase
• Metaphase
• Anaphase
• Telophase
• Cytokinesis
• Which of these are the stages of mitosis?

5

• Interphase
• Prophase
• Metaphase
• Anaphase
• Telophase
• Cytokinesis
• Which of these are the stages of mitosis?
• Make your own mnemonic

6
Understand what the question is asking

• What are the stages of the mitotic cell cycle?
• What are the stages of mitosis?

7
Specification point

• Need to look at the following things at each
  stage of mitosis
• Chromosomes
• Nuclear envelope
• Cell membrane
• Centrioles

8
Main task

• Create a poster of the stages in order commenting
  on each of the key features from the spec
• A picture is needed for each stage
• Add cytokinesis in another colour so it stands
  out as coming after mitosis (not a stage of)

9
Peer assessment

• Look at each slide and assess how people did
• Fill in your feedback sheet

10
Prophase

• Chromosomes
• becoming visible
• Nuclear envelope
• No major point still there
• Cell membrane
• Nothing happening
• Centrioles
• Starting to position themselves and start forming
  the spindle

11
Metaphase

• Chromosomes
• Line up across the equator
• Nuclear envelope
• Disappears
• Cell membrane
• Nothing happening
• Centrioles
• At the poles of the cell and spindle complete

12
Anaphase

• Chromosomes
• Chromatids pulled apart
• Nuclear envelope
• Still missing
• Cell membrane
• Nothing happening
• Centrioles
• Shortening spindle moving the chromatids

13
Telophase

• Chromosomes
• Reach the poles of the cell
• Start to decondense and become less visble
• Nuclear envelope
• One forms around each set of chromosomes
• Cell membrane
• Nothing happening
• Centrioles
• Returned to normal

14
Electron micrographs

• Look at the micrographs
• Identify cells at different stages of mitosis
  you probably wont spot them all

15
Matching mitosis activity from Friday afternoon
Biology

• In groups 5 groups in total
• When you have decided get it checked with the
  master sheet

16
Question to complete on paper and hand in for
marking