Arrange the stages of oogenesis in order of their occurrence.
(A) Formation of ovum & IInd polar body
(B) Meiosis II begins but held at Metaphase II
(C) Meiosis I started but held at Prophase I
(D) Formation of primary oocyte from oogonia
(E) Completion of Meiosis-I and formation of secondary oocyte and first polar body
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (D), (C), (E), (B), (A)
Oogonia form primary oocytes (D), which start meiosis I and stop at prophase I (C); meiosis I is completed at maturity, giving a secondary oocyte and the first polar body (E); meiosis II begins but stops at metaphase II (B); it is completed after the sperm enters, giving the ovum and the second polar body (A).