NEETZoologyHuman Reproduction
Match List-I with List-II regarding the stages of oogenesis in humans. List-I List-II A. Primary oocyte I. Formed by the completion of meiosis-II after fertilization B. Secondary oocyte II. Arrested in prophase-I within the primary follicle C. First polar body III. Formed by the completion of meiosis-I prior to ovulation D. Second polar body IV. Arrested in metaphase-II within the Graafian follicle Choose the correct
Options
- AA-II, B-IV, C-III, D-I
- BA-IV, B-II, C-I, D-III
- CA-II, B-IV, C-I, D-III
- DA-IV, B-II, C-III, D-I
Correct answer
A. A-II, B-IV, C-III, D-I
Step-by-step solution
During oogenesis, the primary oocyte is formed during embryonic development and gets temporarily arrested at the prophase-I stage of meiosis. It is surrounded by a layer of granulosa cells to form the primary follicle. The primary oocyte completes its first meiotic division within the tertiary follicle just prior to ovulation, forming a large secondary oocyte and a tiny first polar body. The tertiary follicle then matures into the Graafian follicle. The secondary oocyte is arrested at the metaphase-II stage of meio