Topics:
Animal Refresher, Animal Reproduction
Match the Column – AI Methods & Reproductive Phenomena
View Complete Answer & Explanation
Question (English)
Match the column — Methods of AI, physiological phenomena, and related species:
| TABLE-I | TABLE-II |
|---|---|
| 1. Recto-vaginal method of A.I. | a. Prolactin |
| 2. Per-vaginal method of A.I. | b. Cattle |
| 3. Vaginal speculum method of A.I. | c. MSH |
| 4. Cork screw pipette method of A.I. | d. Gonadotropins |
| 5. Pseudo pregnancy | e. Mare |
| 6. Bruce effect | f. Swine |
| 7. Whitten effect | g. Sheep/Goat |
- 1-b, 2-e, 3-g, 4-f, 5-c, 6-a, 7-d
- 1-b, 2-e, 3-g, 4-f, 5-a, 6-c, 7-d ✓ Correct
- 1-e, 2-b, 3-g, 4-f, 5-a, 6-c, 7-d
- 1-b, 2-e, 3-g, 4-f, 5-c, 6-d, 7-a
Explanation:
Correct Answer: 1-b, 2-e, 3-g, 4-f, 5-a, 6-c, 7-d
Detailed Explanation
- 1. Recto-vaginal method → (b) Cattle: In cattle (and buffalo), the AI gun is guided through the cervix while the other hand via rectum guides the cervix — the standard method.
- 2. Per-vaginal method → (e) Mare: In the mare, AI is done by blindly passing the pipette through the vagina into the cervix/uterus (per-vaginal/vaginoscopy).
- 3. Vaginal speculum method → (g) Sheep/Goat: A vaginal speculum is used to visualize the cervix in ewes and does for AI, though deep laparoscopic AI is preferred for frozen semen.
- 4. Cork screw pipette → (f) Swine: The sow's cervix has interlocking folds that require a spiral/corkscrew-tipped catheter — locks into the cervical folds like natural mating.
- 5. Pseudo pregnancy → (a) Prolactin: Pseudopregnancy (false pregnancy) is maintained by elevated prolactin levels — especially in bitch and rabbit. Prolactin mimics the luteal support of true pregnancy.
- 6. Bruce effect → (c) MSH: The Bruce effect is the spontaneous abortion/block of pregnancy in female mice upon exposure to a strange male's pheromones — mediated via the olfactory-neuroendocrine axis involving MSH (Melanocyte Stimulating Hormone) pathways.
- 7. Whitten effect → (d) Gonadotropins: The Whitten effect is the synchronization of estrus in female mice exposed to male pheromones — triggered via gonadotropin (LH/FSH) surges mediated by the vomeronasal organ.
