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Question #46904
The Question
In human oogenesis, primary oocytes undergo a prolonged arrest at the diplotene stage of Prophase I (dictyotene stage). If a targeted chemical intervention prematurely overrides this meiotic block, forcing the cell to immediately complete Meiosis I, which of the following represents the most likely biological consequence?
Options
- A.
Formation of a metabolically incompetent secondary oocyte lacking sufficient maternal mRNAs and cytoplasmic reserves for early embryogenesis.
- B.
Failure of homologous chromosomes to undergo recombination, as the pachytene stage is bypassed.
- C.
Inability to dissolve the synaptonemal complex, leading to obligatory non-disjunction during Anaphase I.
- D.
Immediate extrusion of two polar bodies due to the simultaneous completion of both Meiosis I and Meiosis II.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Regulatory_Failure
Understand how NOT, EXCEPT, and logical constraints are used to manipulate exam results.
Concepts Behind This Question
Prophase I Sub-stages Sequence|Growth-Reproduction Mutual Exclusivity
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often memorize the Prophase I sequence (Leptotene -> Zygotene -> Pachytene -> Diplotene -> Diakinesis) but fail to connect the nuclear events with the cytoplasmic requirements of oogenesis.
The trap relies on confusing the timing of crossing over (Pachytene) or synaptonemal complex dissolution (early Diplotene) with the actual functional purpose of the prolonged Diplotene arrest, which is strictly for cellular growth and accumulation of maternal factors.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | The Living World - Class 11 |
| Concept | Growth-Reproduction Mutual Exclusivity |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |