MitosisMitosisMaking ClonesMaking Clones

Cell Division: ChromosomesCell Division: Chromosomes

Cell Division: Cell CycleCell Division: Cell Cycle GG11: :

– Most of the growthMost of the growth– Synthesis of new proteins Synthesis of new proteins

and organelles and organelles S:S:

– DNA replicatedDNA replicated GG22::

– Shortest phaseShortest phase– Organelles and molecules Organelles and molecules

required for cell division required for cell division are producedare produced

Cell Division: ProphaseCell Division: Prophase ChromatinChromatin

Condenses into Condenses into chromosomeschromosomes

““Colored bodies”Colored bodies” Centrioles separate Centrioles separate

and and spindlespindle begins to begins to formform

Nuclear Membrane Nuclear Membrane dissolvesdissolves

Pro- Professional 1stPro- Professional 1st

Cell Division: MetaphaseCell Division: Metaphase The chromosomes The chromosomes

line upline up at the midline at the midline of the spindleof the spindle

Each chromosome is Each chromosome is connected to a connected to a spindle threadspindle thread

Meta- MiddleMeta- Middle

Cell Division:AnaphaseCell Division:Anaphase SisterSister chromatids chromatids

separate and separate and movemove to to opposite polesopposite poles

Spindle shortensSpindle shortens Ana- AwayAna- Away

Cell Division: TelophaseCell Division: Telophase Chromosomes gather Chromosomes gather

at opposite ends at opposite ends Nuclear membrane Nuclear membrane

reformsreforms Cell begins to Cell begins to splitsplit Telo- TelephoneTelo- Telephone

Cell Division: CytokinesisCell Division: Cytokinesis Animal CellsAnimal Cells

– Cleavage furrow forms Cleavage furrow forms from cell membrane from cell membrane pinching inwardpinching inward

– Cell dividesCell divides into equal into equal partsparts

Plant CellsPlant Cells– Cell plate formsCell plate forms – Cell plate converted Cell plate converted

into cell wallinto cell wall

Mitosis in ActionMitosis in Action

CancerCancer Uncontrolled cell Uncontrolled cell

growthgrowth Caused by virus, Caused by virus,

chemicals, or chemicals, or mutationmutation

Can damage Can damage surrounding tissue surrounding tissue and spreadand spread

Mitosis Movie

INTERPHASE

PROPHASE

METAPHASE

ANAPHASE

TELOPHASE