Multiple choice

In oogenesis after arrival of spermatozoa, completion of meiosis takes place by ____________.

  1. restarting the cell cycle by breaking down MPF and turning on APC

  2. restarting the cell cycle by breaking down APC and turning on MPF

  3. formation of first polar body

  4. formation of second polar body

  5. none of these
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A Correct answer
Explanation

Secondary oocyte starts meiosis II and proceeds upto metaphase II, further development starts only after the arrival of spermatozoa. Entery of sperm restarts the cell cycle by breaking down MPF(M-phase promoting factor) and turning on APC(Anaphase promoting complex).

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