What is the major event of the anaphase stage of mitosis?

What is the major event of the anaphase stage of mitosis? What is evidence of this? Please provide a link to the website you used to help me further.
Thanks!
Why is this event absolutely critical to mitosis? (Thanks again for your help!)

Anaphase is the stage of mitosis when sister chromatids break apart and split into two distinct halves. This allows each new cell to have the same DNA as the parent cell.

http://www.cellsalive.com/mitosis.htm

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One Response to What is the major event of the anaphase stage of mitosis?

  1. redsox579 says:

    Anaphase is the stage of mitosis when sister chromatids break apart and split into two distinct halves. This allows each new cell to have the same DNA as the parent cell.

    http://www.cellsalive.com/mitosis.htm
    References :