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Grade 8Zoology

Five oogonia yield 10 primary oocytes, then how many ova are produced on completion of oogenesis?
1]5
2]10
3]15
4]20

Profile image of mgayathri
10 Years agoGrade 8
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2 Answers

Profile image of Akshat Jain
10 Years ago
I Think 2] Will Be The Correct Answer. As Primary Oocyte will convert into its
Profile image of Beenu Mathew
10 Years ago
(2) is the answer..you have to go stepwise in answering this question
we know that each primary ooctye develops a layer of granulosa cells...coming to be known now as a primary follicle.
large numbers degenerate ...hence making only 60K to 80K available.
  etc.primry follicle also develops a layer of granulosa cells and a theca layer.
note that the primary oocyte also grows in size simultaneously.
the secondary follicle also develops a layer of granulosa cells and a a characteristic fluid filled antrum.
NOw called TERTIARY FOLLICLE.
now here, the 1st meiotic division takes place..forming a seondary oocyte and a polar body...
then this secondary ooctye at the time of fertilisation forms a ova and another polar body.
(remember polar bodies are formed so we dont need to include them)
HOPE THIS HELPS!!