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http://player.discoveryeducation.com/index.cfm?guidAssetId=9B385B50-541B-447A-89CF2016A3CFC094&blnFromSearch=1&productcode=US Goal: one cell creates two new identical 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 Chromosome Nuclear membrane Cell membrane [Increasing] 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 Nuclear membrane Chromatin [Preparing] Centrioles *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 Centromere Nuclear membrane Chromosome Spindle fibers [Middle] *Chromosomes line up in center of cell and attach to spindle fibers * Spindle fibers attach to centrioles Centriole Centromere Chromosome Spindle fiber [Apart] Chromosome *Centrioles tug on spindle fibers pulling chromosomes apart * Centromeres are lost Centriole Spindle fiber [Two new] *Two new nuclear membranes appear creating two new identical nuclei *Spindle fibers and centrioles disappear Chromosome Nuclear membrane [cytoplasm divides] Cell membrane * Cytokinesis Chromosomes = cytoplasm divides How? * Animals- cell membrane pinches inward Cell Plate Nuclear membrane * Plants- Cell plate grows from center of cell outward Nuclear membrane * Two new cells identical to parent cell and each other * Each cell contains same number of chromosomes as parent cell Chromosome Interphase = 80% All Materials Double DNA duplicates and cell grows Nucleus Doubles Cell Growth Cytoplasm Divides Interphase Prophase Metaphase Anaphase Telophase Cytokinesis Daughter Cells I I Payed Money At The Car Dealership
