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Question #45362
The Question
An environmental endocrine disruptor damages the coordination of Sertoli cells, inducing 'premature spermiation' where male germ cells are released into the seminiferous tubule lumen before completing their final morphological transformation. Which of the following correctly identifies the released cells and accurately contrasts this male-specific vulnerability with the primary chronological vulnerability of oogenesis?
Options
- A.
The released cells are spermatozoa; spermatogenesis is vulnerable to disruption of the multiplication phase, whereas oogenesis is vulnerable to nondisjunction due to prolonged arrest at Prophase I.
- B.
The released cells are spermatids; spermatogenesis is vulnerable to continuous disruption of cellular differentiation, whereas oogenesis is highly susceptible to chromosomal segregation errors due to prolonged meiotic arrest at Prophase I.
- C.
The released cells are secondary spermatocytes; spermatogenesis is vulnerable to continuous disruption of meiosis, whereas oogenesis is highly susceptible to chromosomal segregation errors due to prolonged meiotic arrest at Prophase II.
- D.
The released cells are spermatids; spermatogenesis is vulnerable to disruption of the maturation phase, whereas oogenesis is highly susceptible to chromosomal segregation errors due to prolonged meiotic arrest at Metaphase II.
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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
Spermatogenesis_vs_Oogenesis_Chronology|Meiotic_Arrest_Points
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: The student must distinguish between 'spermiogenesis' (differentiation of spermatids to spermatozoa) and 'spermiation' (release from Sertoli cells).
Furthermore, they must synthesize the chronological differences between male and female gametogenesis, specifically recognizing that the prolonged fetal-to-puberty arrest in oogenesis occurs at Prophase I of Meiosis I, not Metaphase II, and is the root cause of age-related nondisjunction.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Human Reproduction - Class 12 |
| Concept | Spermiogenesis vs. Spermiation |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |