the cell cycle

• cell cycle


  the cell cycle is the series of stages that cells go through in order to grow and divide.
• what are the 3 main stages in the cell cycle

  interphase, mitosis, cytokinesis
• stage 1 of the cell cycle: interphase

  the cell grows, and increases it's subcellular structure (like mitochondria and ribosome) and replicates it's DNA to ensure each new cell gets a full set of chromosomes.
• what stages occur in mitosis

  prophase, metaphase, anaphase and telophase
• stage 2 : mitosis

  special type of cell division in which a diploid body cell copies itself and finally divides into two genetically identical diploid daughter cells (clones)
• stage 1 of mitosis : prophase

  during prophase the nuclear membrane breaks down and the DNA unwinds and condenses into chromosomes and spindle fibres become visible
• stage 2 of mitosis : metaphase

  during metaphase, the chromosomes line up along the centre of the cell and the spindle fibres attach to chromosomes at the centromere.
• stage 3 of mitosis : anaphase

  during anaphase the chromatids are pulled to opposite edges of the cell bu the spindle fibres.
• stage 4 of mitosis : telophase

  during telophase a nuclear membrane forms around each of the sets of chromosomes separating them from one another
• stage 3 of the cell cycle : cytokinesis

  cytokinesis is the last stage of the cell cycle that occurs splitting the cytoplasm to create 2 separate diploid daughter cells with genetically identical chromosomes
• when does mitosis happen?



  when new diploid cells are needed for growth, repair, asexual reproduction