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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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






2. Allows extension of penis without fibro-elastic penis






3. (FSH) causes egg to mature in females






4. Look for infection - split - and rupture of the penis






5. Scar tissue plugs up chambers of udder






6. 1-2 days






7. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






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






9. 336 days






10. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






11. 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)






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






13. 265-285 days






14. 10-37 (21) days






15. Contains and regulates the temp of the testes for sperm production






16. What helps regulate spermatogenesis?






17. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






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






19. 336 days






20. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






21. (LH) stimulates the Leydig cells to produce testosterone






22. 19-23 (21) days






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






24. Why does estrus happen before ovulation?






25. 30-38 hours after estrus cycle begins






26. Important 'landmark' during palpation






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






28. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






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






30. Milk is 15% ________ and 85% __________.






31. 1. brain function - 2. blood flow - 3. willing female






32. 16-20 hours






33. Days which have decreasing daylight hours

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34. What makes the milk flow through the mammary glands?






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






36. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






37. What about the sperm for a bull which has been castrated but still has testicles?






38. Actual heat cycle (period)






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






40. Parturition is controlled by...






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






42. 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.






43. FEED






44. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






45. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






46. 19-23 (21) days






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






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






49. 1. brain function - 2. blood flow - 3. willing female






50. Superior genes are _______ to multiply