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






3. Luteolysis happens because of the ____________ hormone






4. Sperm is produced here






5. (switzerland) 2nd in size and milk production - most muscle -






6. 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.






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






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






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






10. Birthing process (termination of gestation)






11. (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






12. 283 days






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






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






15. Depository for semen during insemination. where urine leaves the body






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






17. 114 days






18. Sperm production






19. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






20. Failure to have both testis (gonads) descend






21. Duct through penis that carries sperm and urine






22. Why does estrus happen before ovulation?






23. Animal which has been castrated after puberty






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






25. 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.






26. 45-60 days after breeding; re-breed as required






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






28. 26 hours after estrus begins






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






30. 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.






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






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






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






34. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






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






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






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






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






39. What helps regulate spermatogenesis?






40. Important 'landmark' during palpation






41. (switzerland) 2nd in size and milk production - most muscle -






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






43. Days which have decreasing daylight hours

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44. Front feet and head first. (except for hogs and dogs)






45. Days which have increasing daylight hours

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46. Important 'landmark' during palpation






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






48. Produce testosterone. located between the seminiferous tubules






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






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