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Mitosis. Mitosis. Four main stages PMAT P rophase M etaphase A naphase T elophase. Prophase. 1 st stage of mitosis after Interphase Nucleolus disappears Nuclear envelope breaks down Chromatin condenses into chromosomes Chromosomes can be seen as “sister chromatids” - PowerPoint PPT Presentation
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MitosisMitosis
MitosisMitosis Four main stagesFour main stages
PMATPMATPProphaserophaseMMetaphaseetaphaseAAnaphasenaphaseTTelophaseelophase
ProphaseProphase 11stst stage of mitosis after Interphase stage of mitosis after Interphase
Nucleolus disappearsNucleolus disappears Nuclear envelope breaks downNuclear envelope breaks down Chromatin condenses into chromosomesChromatin condenses into chromosomes
Chromosomes can be seen as “sister Chromosomes can be seen as “sister chromatids”chromatids”
Mitotic spindles formMitotic spindles form Chromosomes attach to spindlesChromosomes attach to spindles
ProphaseProphase
ProphaseProphase
DRAW IT
MMetaphaseetaphase Chromosomes gather in a plane Chromosomes gather in a plane
across the middle of the cellacross the middle of the cell
MMeet eet MMe in the e in the MMiddleiddle
MetaphaseMetaphase
DRAW IT
AAnaphasenaphase ““Sister” chromatids separate from Sister” chromatids separate from
each othereach other Chromatids move Chromatids move AAway from each other way from each other
towards opposite ends of the celltowards opposite ends of the cell Spindles attached to chromosomes Spindles attached to chromosomes
get shorterget shorter Spindles not attached get longerSpindles not attached get longer
Pushes poles of cell further apartPushes poles of cell further apart
AAnaphasenaphase
AAnaphasenaphase
DRAW IT
TelophaseTelophase Chromosomes reach opposite polesChromosomes reach opposite poles Spindles disappearSpindles disappear Nuclear envelope and Nucleolus Nuclear envelope and Nucleolus
reappearreappear Chromosomes uncoil and return to Chromosomes uncoil and return to
chromatin statechromatin state
TelophaseTelophase
Cytokinesis
Cytoplasm divides creating two new Cytoplasm divides creating two new cellscells
Original “parent” cell no longer existsOriginal “parent” cell no longer exists
CytokinesisIn animals, it appears as an indentation•Like a draw string around the cell is being tightened
•Water balloon model
In plants, a cell plate forms from within the cell which eventually becomespart of the cell wall
CytokinesisCytokinesis
DRAW ITFor plant &
animal
PracticePractice
InterphaseInterphase
The cell has finished growing and replicating the DNA and is ready to divide.
ProphaseProphase
The Nuclear membrane breaks down and the chromosomes become distinct.
MetaphaseMetaphase
The chromosomes move to the center of the cell with the centromeres in a straight line.
AnaphaseAnaphase
The centromeres split and the chromatids move to opposite ends of the cell.
TelophaseTelophase
The chromatids reach the ends of the cell.
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Put the following slides in Put the following slides in orderorder
A
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E