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Mitosis

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Why do cells divide? - Growth by reproducing - Repair, to fill in cuts - Reproduction, they are living things
Cell Life Cycle 1. Interphase 2. Mitosis 3. Cytokinesis
Interphase -Longest Stage -NOT resting stage Life processes go on: Growth, cellular respiration, normal metabolic roles, and specialized functions, preparations for mitosis - When cells prepare to divide, the DNA is copied, more organelles formed, and gets bigger
Are DNA visible in interphase? No, long, thin, invisible strands (uncoiled chromatin)
Mitosis The division of the contents of the nucleus
Cytokinesis The division of the cytoplasm and organelles to form two identical cells
Prophase -DNA copied -DNA condenses into compact form -Each chromosomes have 2 identical sister chromatids -Nuclear membrane dissolves
Are DNA visible in prophase? Yes,Visible under microscope as chromosomes.
Metaphase -Chromosomes line up in the middle -Mitosis DOES NOT continue unless they are in middle -Line is called equator -Spindle fiber help pull chromosomes in place -Centrioles anchor spindle fiber on opposite areas of the cell
Are DNA visible in metaphase? Yes, they are easily visible in the equator
Anaphase -Centromere splits sister cells are pulled apart to opposite side of cell -Called Daughter Chromosomes now
Are DNA visible under anaphase? Yes
Telophase -Daughter chromosomes uncoil and become visible (become chromatin) -New nuclear membrane around each group of daughter chromosomes -Cell looks like two nuclei before membrane forms
Cytokinesis (cell movement) -Two nuclei splits apart -Divide organelles and cytoplasm -Animal cell dividing area called cleavage furrow -Plant cell is a fragmented late forms between nuclei and forms a new cell wall
Cell division may not happen if.. -DNA is damaged -DNA is not replicated -Not enough nutrients
Created by: nguyenbqm
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