Friday 19 October 2012

meiosis - How do you see the stage of the second meiotic arrest in oogenesis in the given video?

I seem to understand the thing now.



The video is utterly simplified for animal cell meiosis I and II.
In oogenesis, you get after every anaphase one cell with very little cytoplasm, polar body, and another cell with much cytoplasm. In the video, the amount of cytoplasm is equal so the thing is idealized.



The video is better to explain male gametogenesis: spermatogenesis, since the amount of cytoplasm does not differ after each anaphase.



The video is too going too fast to teach you oogenesis, since in reality the things are arrested rather long time. The second meiotic arrest in oogenesis can lasts 12 - 50 years starting after puberty. The rupturing secondary oocytes lasts then again less in the second meiotic arrest of oogenesis, since they start to develop into ovum after the monthly release.

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