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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. 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.






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






3. 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






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






5. 19-23 (21) days






6. 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.






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






8. Why Dairy calves are fed powdered milk.






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






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






11. Birthing process (termination of gestation)






12. 283 days






13. Days which have decreasing daylight hours

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14. 1-3 days






15. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






16. Animal which has been castrated after puberty






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






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






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






20. Not under a timeline - cow can not be sold as steak






21. 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






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






23. 45-60 days after breeding; re-breed as required






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






25. 2 month growth cycle. stored in the epididymis of the bull






26. 4-6 days






27. 19-23 (21) days






28. 30-38 hours after estrus cycle begins






29. (FSH) causes egg to mature in females






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






31. Allows extension of penis without fibro-elastic penis






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






33. Luteolysis happens because of the ____________ hormone






34. Can survive ~7 days in cow. vast majority <48 hours






35. Sperm production






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






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






38. 1-2 days






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






40. 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






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






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






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






44. The more stressed out the male is - the less sperm he is going to produce






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






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






47. Provide nourishment for the developing sperm






48. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






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






50. Why does estrus happen before ovulation?