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Question #45469
The Question
A pharmacological agent that selectively blocks the positive feedback of estrogen on the anterior pituitary is administered to a healthy adult female during the mid-follicular phase. If the dominant ovarian follicle is examined on day 14 of her menstrual cycle, what will be the meiotic stage and chromosomal status of the gamete within it?
Options
- A.
Arrested at Metaphase II; Haploid (n) with 2C DNA content
- B.
Arrested at Prophase I; Diploid (2n) with 4C DNA content
- C.
Arrested at Metaphase I; Diploid (2n) with 4C DNA content
- D.
Arrested at Prophase II; Haploid (n) with 2C DNA content
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Comparative_Analysis
Sharpen your ability to evaluate multiple scenarios and distinguish between competing potential answers.
Concepts Behind This Question
Primary_Oocyte|LH_Surge|Secondary_Oocyte|Meiosis_II
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Distinguishing between the two meiotic arrest points in oogenesis and their specific endocrine triggers.
Students commonly default to 'Metaphase II arrest' (Option A) when thinking of an unfertilized ovum, forgetting that the transition from Prophase I to Metaphase II is strictly dependent on the LH surge.
Integrating Cell Cycle DNA content (2n/4C) with Human Reproduction elevates the difficulty to NEET-Plus level.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Chemical Coordination and Integration - Class 11 |
| Concept | Progesterone/Estrogen Feedback |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |