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Goal: one cell creates two newGoal: one cell creates two new identical cellsidentical cells

1.Interphase – period of rapid growth – all materials are doubling

2. Mitosis - nucleus of cell divides [4 stages] Prophase Metaphase Anaphase Telophase

3. Cytokinesis - cytoplasm divides

1.Growth – allows organism to reach maturity 2. Replace worn out cells- every cell dies at some point

3. Repair damaged cells – allows damaged areas of organisms to be fixed

Cells that do not go through cell cycle: Muscle & Nerve

Nuclearmembrane

Chromosome

Cell membrane

* Cell Membrane, nuclear membrane, cytoplasm, and all organelles double

* DNA doubles

* DNA long, thin threads = chromatin

*Cell needs to double all materials in order to be able make two new cells

[Increasing]

Cell membrane

Chromatin Nuclearmembrane

*DNA shortens and coils- chromosomes appear

*Centromeres appear [hold chromosomes together]

*Spindle fibers appear

*Centrioles appear [poles found in animal cells, will guide chromosome movement]

* Nuclear membrane begins to disappear

[Preparing]

Centromere Nuclearmembrane

Centrioles

Spindle fibers

Chromosome

[Middle]

*Chromosomes line up in center of cell and attach to spindle fibers

* Spindle fibers attach to centrioles

Centriole

Spindle fiber Chromosome

Centromere

*Centrioles tug on spindle fibers pulling chromosomes apart

* Centromeres are lost

[Apart]

Chromosome

Spindle fiber

Centriole

*Two new nuclear membranes appear creating two new identical nuclei

*Spindle fibers and centrioles disappear

[Two new]

ChromosomeNuclear membrane

* Cytokinesis = cytoplasm divides

How?* Animals- cell membrane pinches * Plants- Cell plate grows from center inward of cell outward

[cytoplasm divides]

Cell membrane

Nuclear membrane

Cell PlateChromosomes

* Two new cells identical to parent cell and each other

* Each cell contains same number of chromosomes as parent cell

Chromosome

Nuclearmembrane

Cell Growth

DNA duplicates and cell grows

Cytokinesis

Interphase = 80%All Materials Double

Nucleus Doubles

Cytoplasm Divides

IInterphasePProphaseMMetaphaseAAnaphaseTTelophaseCCytokinesisDDaughter Cells

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