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During oogenesis meiosis takes place or …

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During oogenesis meiosis takes place or mitosis??

Posted by Rida Khan 7 years, 4 months ago

CBSE > Class 12 > Biology

1 answers

Gopika Gaur 7 years, 4 months ago

Step1: oogonia form primary oocyte (by mitosis ) Step2: primary oocyte divide to form secondary oocyte and one polar body at puberty (by 1st meiotic division) Step3: secondary oocyte form new membrane zona pellucida and when this layer rupture ovum is released ( ovulation) Step4: if ovum is fertilised then 2nd meiotic division takes place ( meiosis 1 happened already in step2) if not fertilised then endometrium shed off.

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