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Question #45565
The Question
A 30-year-old female with patent fallopian tubes undergoes GIFT (Gamete Intrafallopian Transfer). The procedure fails because the donor's retrieved gametes were cytologically incompetent for in vivo fertilization. For a successful GIFT procedure, the transferred female gamete must be at which specific stage of oogenesis, and what physiological event is required to break its meiotic arrest in the recipient's ampulla?
Options
- A.
Secondary oocyte arrested at Metaphase II; entry of the sperm into the oocyte.
- B.
Primary oocyte arrested at Diplotene of Prophase I; the pre-ovulatory LH surge.
- C.
Secondary oocyte arrested at Anaphase II; completion of sperm capacitation.
- D.
Mature ovum having completed Meiosis II; fusion of male and female pronuclei.
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
GIFT|Meiotic Arrest Points|Secondary Oocyte
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often confuse the colloquial term 'ovum' used in Reproductive Health (GIFT) with its strict cytological identity in Human Reproduction (a secondary oocyte arrested at Metaphase II).
The trap relies on failing to distinguish between the two meiotic arrest points in oogenesis (Prophase I vs.
Metaphase II) and their specific triggers (LH surge vs.
Sperm entry).
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Reproductive Health - Class 12 |
| Concept | GIFT Applicability |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |