1.1.3

...

HideShow resource information
  • Created by: Maryan
  • Created on: 09-03-12 11:18

Mitosis

  • Mitosis only occupies a small percentage of cell growth, the rest of it is spent in checking for errors
  • This happens during interphase when the DNA is checked for any errors
  • If any errors occur the cell kills itself to prevent mutation
  • Needed for growth and repairing of damaged tissues

Four stages: I Passed My Alevels Today Cheers

Interphase:

Cell carries out its normal functions and prepares itself to divide

Cells DNA is replicated and unravelled

1 of 3

Four stages: I Passed My Alevels Today Cheers

Interphase:

  • Cell carries out its normal functions and prepares itself to divide
  • Cells DNA is replicated and unravelled

Prophase

  • The chromosomes condense
  • Centrioles appear at each opposite sides of the cell, the release their spindles

Metaphase:

  • The chromatids line up in the middle of the cell
  • The spindle of the centrioles attaches itself to the chromatids

Anaphase:

  • The centromeres divide and the
  • The sister chromatids are pulled apart to each opposite side of the cell

Telophase:

  • The sister chromatids are now fully seperated and at opposite ends of the cell due to the spindles pulling them, they uncoil and become less dense
  • The nuclear membrane reappears and now there are two genetically identical daighter cells each with their own nucleus.
2 of 3

Significance of mitosis for growth, repair and ase

3 of 3

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all resources »