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10 Cards in this Set
- Front
- Back
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Interphase |
- first stage of cell division - divided into three phases( G1, S , G2) - G1: cell grows larger - S: synthesis, genome is replicated - G2: second growth phase - separates the newly replicated genome and marks the end of interphase |
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Mitosis |
- prophase, metaphase, anaphase and telophase - spindle fibers attach to the chromosomes and pull sister chromatids apart - separates the two daughter genomes |
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Cytokinesis |
- last stage during cell division - cytoplasm divides to create two daughter cells - in animal cells: the cell is pinched in two - in plant cells: form a plate between the dividing cells |
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Tumors - a result of uncontrolled cell division |
- tumors are formed when cell division is wrong and is no longer controlled - can occur in any organ and tissue |
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Interphase: an active period |
- many metabolic reactions occur in interphase - protein synthesis - DNA replication and an increase in the # of mitochondria and/or chloroplasts |
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Prophase |
- spindle microtubules grow and extend from each pole to the equator - chromosomes super coil (short and bulky) - nuclear envelope breaks down |
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Metaphase |
- chromatids move to the equator and the spindle microtubules from each pole attach to each centromere on opposite sides |
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Anaphase |
- spindle microtubules pull the sister chromatids apart, splitting the centromeres - splits the sister chromatids into chromosomes - identical chromosomes are pulled to opposite poles |
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Telophase |
- spindle microtubules break down - chromosomes uncoil - no longer visible - nuclear membrane reforms - cell divides by cytokinesis to form two daughter cells with identical genetic nuclei |
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Where Mitosis Occurs |
- growth, embryonic development, tissue repair and asexual reproduction involves mitosis |
