mitosis onion root tip...mitosis cell division occurs in a series of stages or phases. mitosis...
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MitosisOnion Root Tip
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medium power
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medium power
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Most of the cells look like this. Your assignment is to find cells that look different. Draw as many different looking cells as you can find!
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Mitosis
Cell division occurs in a series of stages or phases.
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Mitosis
Replication and division of the nucleus
It insures that each of the cells has a complete set of DNA
“chromosomes”
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Interphase(cell is doing its normal function)
• Nucleus and nucleolus visible
• chromatin (chromosomes NOT visible)
• Nuclear membrane intact
• DNA replicates
animal cell
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plant cell
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plant cell
interphase Prophase metaphase anaphase Telophase
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Prophase
• Nuclear membrane and nucleolus dissolve
• Chromatin condensing into visible chromosomes
• In animal cells centrioles move to opposite poles
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centrioles
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plant cell
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Metaphase
• Spindles line up chromosomes in center of cell
• Asters appear in animal cells
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plant cell
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Anaphase
• Centromeres separate• Chromosomes are pulled
toward poles by spindles
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plant cell
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Telophase
• Chromosomes uncoil into chromatin
• Nuclear membranes reform• Nucleolus reappear• Centrioles replicate• Cytokinesis occurs-division of
cytoplasm
– Animal cell- membrane pinches
– Plant cell- cell wall forms inside out
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plant cell
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Daughter Cell
• Two smaller cells are formed with the exact same chromosomes as the parent cell
• Cells are back in interphase
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Daughter Cells
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plant cell
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whitefish
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animal mitosis
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Cells spend a small amount of time doing mitosis, the rest of the cell cycle is spent in interphase.
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Cell cycle