Mitosis

• Interphase

  • G1: cell grows, organelles replicate, new proteins made
  • S: DNA replicates, each chromosome consists of 2 identical sister chromatids and are joined at the centromere
  • G2: cell grows, new proteins made, chromosomes repair
• Prophase

  • chromosomes condense and become visible in the nucleus
  • nuclear envelope breaks down
  • centrioles move to opposite poles and form spindle fibres
• Metaphase

  • chromosomes line up along the equator of the cell
  • they attach to spindle fibres by their centromere
• Anaphase

  • centromeres divide, separating each pair of sister chromatids
  • spindle fibres shorten, pulling chromatids to opposite poles of the spindle
• Telophase

  • chromosomes reach the opposite poles and decondense
  • a nuclear envelope forms around each set of chromosomes
• Cytokinesis

  • cytoplasm divides, forming 2 genetically identical daughter cells