cell cycle

• cell cycle


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



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

  
  

  The cell grows, increases its subcellular structures (like mitochondria and ribosomes), and replicates its DNA to ensure each new cell gets a full set of chromosomes.
• what stages occur in mitosis



  prophase, metaphase, anaphase, 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 centremere
• stage 3 of mitosis : anaphase


  during anaphase the chromotids are pulled to opposite edges of the cell by 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 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
• diploid


  a cell that contains two complete sets of chromosomes - 23 pairs (46)
• when does mitosis happen?


  growth

  repair (replacement of damaged cells)

  asexual reproduction
• Why does mitosis happen?

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