Mitosis

• The cell cycle are the series of events that take place as a cell grows and divides
• How many parts are there to the cell cycle?

  2 parts which are…

  • Mitosis 10%
  • Interphase 90%
• The cell cycle is first in the…

  1. Interphase
  2. Mitosis
• The phases during interphase are

  1. G1 - Growth phase1
  2. S - Synthesis phase
  3. G2 - Growth phase II
• What happens during interphase?

  • Organelles replicate (mitochondria , ribosomes)
  • the cell grows
  • DNA is replicated within the nucleus and replicated DNA is checked for errors
• What happens specifically in the Synthesis phase?

  DNA is replicated withi the errors and is checked for errors
• The parent cell contains two complete sets of chromosomes - the cell i said to be diploid (d for double as you have one chromosomes from dad and another one from mom)
• In humans , there are 46 chromosomes in each cell arranged as 23 pairs.
• Why must DNA replicate?

  it must so that each new daughter cell contains the same amount of chromosomes as its parent cell
• First diagram: 1 chromosome and 1 chromatid

  Second diagram : 1 chromosomes and 2 chromatid

  
• What happens in mitosis?

  1. Prophase - means before
  2. Metaphase - M for middle
  3. Anaphase- A for away
  4. Telophase - T for two
  5. Cytokinesis
• What happens in prophase?

  • The chromosomes are visible and they are condensing
  • The nuclei Membrance has to start breaking down
• What happens in Metaphase?

  • The chromosomes are lining up in the middle of the cell and the nuclei membrane has been broken down.
• What happens in Anaphase?

  • The chromatids move opposite sides of the cell
• What happens in Telophase?

  • The chromosomes are at opposite ends of the cell and two new nucleotide start to form around them
• What happens in Cytokinesis?

  • Is responsable fo the final separation into two cells by splitting the cytoplasm
• Mitosis is the process by which a cell replicates its chromosomes and produces two identical nuclei