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Biology · 2025 · 1 mark
CBSE 2025 · Region 4 · Set 3 · Q2
Given below are few statements with reference to oogenesis in a human female: (i) An unequal division of the primary oocyte forms a large secondary…
Given below are few statements with reference to oogenesis in a human female :
(i)
An unequal division of the primary oocyte forms a large secondary oocyte and a tiny first polar body.
(ii)
A couple of thousands of oogonia are formed within each fetal ovary during embryonic development.
(iii)
Primary oocytes start meiosis-I but it gets arrested temporarily at prophase-I during fetal development.
(iv)
Fertilisation induces the completion of the meiotic division of the secondary oocyte.
(v)
A primary oocyte on meiosis forms an ovum and a polar body. Choose the option with all true statements from the given options :
Official answer
(D)
(i), (iii), (iv)
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CBSE Class 12 Biology past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.