StarterStarter

On a post it draw a circleOn a post it draw a circle

This is to represent the cell cycleThis is to represent the cell cycle

Shade the % of it that you think is Shade the % of it that you think is taken up by mitosistaken up by mitosis

Stick onto the white boardStick onto the white board

How did you do?

Learning objectivesLearning objectives

Recall the stages in the mitotic Recall the stages in the mitotic cell cyclecell cycle

Describe the key features of Describe the key features of each stage of mitosiseach stage of mitosis

Identify the stage of mitosis in Identify the stage of mitosis in electron micrographselectron micrographs

I pee on the mat cI pee on the mat cInterphaseInterphaseProphaseProphaseMetaphaseMetaphaseAnaphase Anaphase Telophase Telophase CytokinesisCytokinesis

Which of these are the stages of Which of these are the stages of mitosis?mitosis?

InterphaseInterphase

ProphaseProphase

MetaphaseMetaphase

Anaphase Anaphase

Telophase Telophase

CytokinesisCytokinesis

Which of these are the Which of these are the stages of mitosis?stages of mitosis?

Make your own mnemonicMake your own mnemonic

Understand what the question is Understand what the question is askingasking

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

What are the stages of mitosis?What are the stages of mitosis?

Specification pointSpecification point

Need to look at the Need to look at the following things at following things at each stage of each stage of mitosismitosis

ChromosomesChromosomes

Nuclear envelopeNuclear envelope

Cell membrane Cell membrane

Centrioles Centrioles

Main taskMain task

Create a poster of the stages in Create a poster of the stages in order commenting on each of the order commenting on each of the key features from the speckey features from the spec

A picture is needed for each A picture is needed for each stagestage

Add cytokinesis in another Add cytokinesis in another colour so it stands out as coming colour so it stands out as coming after mitosis (not a stage of)after mitosis (not a stage of)

Peer assessmentPeer assessment

Look at each slide and assess Look at each slide and assess how people didhow people did

Fill in your feedback sheet Fill in your feedback sheet

ProphaseProphaseChromosomes Chromosomes

becoming visiblebecoming visibleNuclear envelopeNuclear envelope

No major point still there No major point still there Cell membraneCell membrane

Nothing happeningNothing happeningCentriolesCentrioles

Starting to position themselves and Starting to position themselves and start forming the spindlestart forming the spindle

MetaphaseMetaphaseChromosomesChromosomes

Line up across the equatorLine up across the equatorNuclear envelopeNuclear envelope

Disappears Disappears Cell membrane Cell membrane

Nothing happeningNothing happeningCentriolesCentrioles

At the poles of the cell and spindle At the poles of the cell and spindle completecomplete

AnaphaseAnaphaseChromosomesChromosomes

Chromatids pulled apartChromatids pulled apartNuclear envelopeNuclear envelope

Still missingStill missingCell membrane Cell membrane

Nothing happeningNothing happeningCentrioles Centrioles

Shortening spindle moving the Shortening spindle moving the chromatidschromatids

TelophaseTelophaseChromosomesChromosomes

Reach the poles of the cellReach the poles of the cellStart to decondense and become less Start to decondense and become less

visblevisbleNuclear envelopeNuclear envelope

One forms around each set of One forms around each set of chromosomeschromosomesCell membrane Cell membrane

Nothing happeningNothing happeningCentrioles Centrioles

Returned to normalReturned to normal

Electron micrographsElectron micrographs

Look at the micrographs Look at the micrographs

Identify cells at different stages Identify cells at different stages of mitosis – you probably won’t of mitosis – you probably won’t spot them all spot them all

Matching mitosis activity from Matching mitosis activity from Friday afternoon BiologyFriday afternoon Biology

In groups – 5 groups in totalIn groups – 5 groups in total

When you have decided get it When you have decided get it checked with the master sheetchecked with the master sheet

Question to complete on paper Question to complete on paper and hand in for markingand hand in for marking