Mitosis
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Mitosis

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My Mitosis Presentation!

My Mitosis Presentation!

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Mitosis Mitosis Presentation Transcript

  • The Stages of Mitosis Interphase, Prophase, Prometaphase, Metaphase, Anaphase, Telophase, Cytokinesis, and back to Interphase!
  • Interphase This is the longest period of the cell cycle. During this cycle, DNA replicate, the centrioles divide, and the proteins are actively produced.
  • Between Interphase and Prophase
  • Prophase During this first stage, the nucleolus fades and chromatin condenses into chromosomes. Each replicated chromosome comprises two chromatids, both with the same genetic information. Microtubules of the cytoskeleton, responsible for the cell shape, motility and attachment to other cells during interphase, disassemble.
  • Between Prophase and Prometaphase
  • Prometaphase In this stage the nuclear envelope breaks down so there is no longer a recognizable nucleus. Some mitotic spindle fibres elongate from the centrosomes and attach to kinetochores, protein bundles at the centromere region on the chromosomes where sister chromatids are joined. Other spindle fibres elongate but instead of attaching to chromosomes, overlap each other at the cell centre.
  • Between Prometaphase and Metaphase
  • Metaphase Tension applied by the spindle fibres aligns all chromosomes in one plane at the centre of the cell.
  • Between Metaphase and Anaphase
  • Anaphase Spindle fibres shorten, the kinetochores separate, and the chromatids are pulled apart and begin moving to the cell poles.
  • Between Anaphase and Telophase
  • Telophase The daughter chromosomes arrive at the poles and the spindle fibbers that have pulled them apart disappear.
  • Between Telophase and Cytokinesis
  • Cytokinesis The spindle fibres not attached to chromosomes begin breaking down until only that portion of overlap is left. It is in this region that a contractile ring cleaves the cell into two daughter cells. Microtubules then reorganize into a new cytoskeleton for the return to interphase.
  • Between Cytokinesis and Interphase
  • Interphase This is the longest period of the cell cycle. During this cycle, DNA replicate, the centrioles divide, and the proteins are actively produced.
  • Made By Emily