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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. Way to know everything is alright with the breeding male






2. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






3. Birthing process (termination of gestation)






4. Way to know everything is alright with the breeding male






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






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






7. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






8. Days which have increasing daylight hours

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9. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






10. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






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






12. (male) pushes the testes outward toward the legs for a cool-down off of the body






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






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






15. Help to signal hormone levels which we need both in the brain right next to each other.






16. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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17. What helps regulate spermatogenesis?






18. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






19. Start of the reproductive tract for the female. located outside of the body






20. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.






21. 16-20 hours






22. 1-3 days






23. 336 days






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






25. Why does estrus happen before ovulation?






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






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. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






29. Why does estrus happen before ovulation?






30. Sperm is produced here






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






32. Actual heat cycle (period)






33. Animals which have many estrous periods per year (ex: cow - sow)






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






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






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






37. Important 'landmark' during palpation






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






39. Failure to have both testis (gonads) descend






40. 14-19 (17) days






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






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






43. 147 days






44. 114 days






45. ~60 days before calving






46. 283 days






47. 19-23 (21) days






48. Failure to have one testis (gonad) to descend






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






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