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Question #45553
The Question
During a standard in vitro fertilization (IVF) procedure, a zygote is analyzed and found to be triploid (69, XXY) due to the successful penetration of two sperms into the ovum. Which specific physiological mechanism failed to operate correctly, and what is the appropriate clinical decision regarding this zygote?
Options
- A.
Failure of the acrosome reaction; the zygote should be transferred to the fallopian tube via ZIFT.
- B.
Failure of the zona reaction mediated by cortical granules; the embryo is biologically non-viable and is discarded.
- C.
Inability of the sperm to bind to ZP3 receptors; the embryo should be transferred to the uterus via IUT.
- D.
Failure of the secondary oocyte to extrude the second polar body; the embryo requires Medical Termination of Pregnancy (MTP).
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
Polyspermy Prevention Mechanisms|MTP Legal Parameters|Infertility Definition
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Distinguishing between mechanisms that facilitate fertilization (acrosome reaction) and those that prevent polyspermy (cortical/zona reaction).
Common Misconception: Students often confuse the source of triploidy and misapply the legal/clinical term 'MTP' (Medical Termination of Pregnancy) to the routine discarding of anomalous in vitro embryos before implantation.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Reproductive Health - Class 12 |
| Concept | MTP Legal Parameters |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |