1.6  Cell Division

big ninja

Essential Idea:

Cell division is essential

but must be controlled


  • Mitosis is division of the nucleus into two genetically identical daughter nuclei
  • Chromosomes condense by supercoiling during mitosis
  • Interphase is a very active phase of the cell cycle with many processes occurring in the nucleus and cytoplasm
  • Cytokinesis occurs after mitosis and is different in plant and animal cells
  • Cyclins are involved in the control of the cell cycle
  • Mutagens, oncogenes and metastasis are involved in the development of primary and secondary tumours


  • The correlation between smoking and incidence of cancers


  • Identification of phases of mitosis in cells viewed with a microscope or in a micrograph
  • Determination of a mitotic index from a micrograph