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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 19-23 (21) days






2. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






3. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






4. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






5. Sperm production






6. ~305 days (altough often longer due to breeding difficulties)






7. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






8. 30-38 hours after estrus cycle begins






9. Superior genes are _______ to multiply






10. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






11. Check feet and legs - look for masculine traits in build such as crest and muscling






12. Failure to have both testis (gonads) descend






13. Larger the cow - more milk is produced; smaller the cow - less milk is produced






14. Larger the cow - more milk is produced; smaller the cow - less milk is produced






15. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






16. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






17. Microscopic - make sure not sterile - very few bulls are actually tested






18. Sperm production






19. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






20. Implies the amount of estrogen production






21. 45-60 days after breeding; re-breed as required






22. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






23. Milk ~305 days - dry 60 days prior to calving






24. Provide nourishment for the developing sperm






25. When are steers and heifers weaned from bottle feeding?






26. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






27. Important 'landmark' during palpation






28. 30 hours after estrus begins






29. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






30. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






31. (male) pushes the testes upward toward the body for warmth or protection






32. (LH) causes female's egg to break (her period)






33. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






34. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






35. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






36. 26 hours after estrus begins






37. Failure to have both testis (gonads) descend






38. Provide nourishment for the developing sperm






39. 265-285 days






40. Animals which have only one estrous cycle (ex: dog - fox)






41. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






42. Luteolysis happens because of the ____________ hormone






43. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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44. 14-19 (17) days






45. Actual heat cycle (period)






46. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






47. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






48. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






49. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






50. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated







Sorry!:) No result found.

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