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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. (LH) stimulates the Leydig cells to produce testosterone






3. 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.






4. 114 days






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






6. 14-19 (17) days






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






8. 10-37 (21) days






9. Days which have decreasing daylight hours

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






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






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






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






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






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






16. 265-285 days






17. 16-20 hours






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






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






20. 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.






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






22. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






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






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






25. Prevent the cow from getting an infection from the calve






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






27. Animal which has been castrated after puberty






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






29. 2 month growth cycle. stored in the epididymis of the bull






30. Luteolysis happens because of the ____________ hormone






31. FEED






32. 265-285 days






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






34. Superior genes are _______ to multiply






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






36. Sperm is produced here






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






38. (FSH) causes egg to mature in females






39. Failure to have both testis (gonads) descend






40. Duct through penis that carries sperm and urine






41. 4-6 days






42. 283 days






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






44. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






45. Why does estrus happen before ovulation?






46. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






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






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






49. 1-3 days






50. Provide nourishment for the developing sperm







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