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Interphase Mitosis Cytokinesis
The Cell Cycle Interphase Mitosis Cytokinesis
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How do little elephants grow up to be BIG elephants?
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Why do animals shed their skin?
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How does the cell know how to divide?
Cell Division Reproduction Growth Repair Why do cells divide? How does the cell know how to divide? The DNA has the instructions for all of the cell’s activities.
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Cell Cycle 3 Parts The sequence of development and division of a cell
Interphase - Preparation Mitosis – Cell division Cytokinesis – Splitting Adult human cell: ~24 hrs 18-20 hours in interphase 2 hours in mitosis How long does it take?
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Animated Cell Cycle Interphase Prophase Metaphase Anaphase Telophase
Interphase Prophase Metaphase Anaphase Telophase Cytokinesis
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occurs before mitosis begins
Interphase occurs before mitosis begins What happens Centrioles Cell in Resting State When ready to divide, Cell doubles in size DNA replicates or copies itself Organelles double in number DNA condenses into chromatin, a thread like coil Nucleolus Chromatin Cell Membrane
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Interphase Plant Cell Animal Cell
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Number of Chromosomes in Different Species
Dog - 76 Rat – 92 Bean – 22 Human – 46 Elephant – 56 Cow – 60 Fly 8 Chimp - 48
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Mitosis: 1st PROPHASE What happens
Chromosome Chromatin (DNA) forms into 2 sister chromatids that make up 1 chromosome = Chromosomes Form Spindle fibers form Centrioles move toward opposite ends of the cell Nuclear membrane begins to disappear Nucleolus disappears Centromere 2 Sister Chromatids
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Prophase Plant Cell Animal Cell Spindle fibers Centrioles
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Mitosis: 2nd METAPHASE What happens Nucleus has disappeared completely
Spindle Fibers attach to centromeres Chromosomes line up in the middle of the cell Chromatid 1A Centrioles Chromosome 1 Chromatid 1B
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Metaphase Plant Cell Animal Cell
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Mitosis: 3rd ANAPHASE What happens Centromeres divide
Chromatid What happens Centromeres divide Spindle Fibers pull chromatids away towards opposite poles Chromosomes are separated Centrioles Spindle Fibers
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Anaphase Plant Cell Animal Cell
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Mitosis: TELOPHASE What happens
Nuclear membrane forms around each group of chromosomes Chromosomes unwind into chromatin Cytokinesis begins Centrioles Cell begins to separate
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Telophase Plant Cell Animal Cell
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Cytokinesis What happens Chromatin returns to DNA
2 Identical Cells Chromatin returns to DNA Cytoplasm and organelles divide into each cell One cell becomes 2 cells What happens
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Final Product Mitosis produces 2 daughter cells genetically identical to each other and the original parent cell.
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Animal Mitosis -- Review
Interphase Prophase Metaphase Anaphase Telophase
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Plant Mitosis -- Review
Interphase Prophase Metaphase Anaphase Telophase
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IPMATC REMEMBER! Interphase Prophase Metaphase Anaphase Telophase
Cytokinesis IPMATC A mnemonic to help remember the stages of mitosis. I Play More At The Circus
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Cell Cycle
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