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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. 19-23 (21) days






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






3. 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.






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






5. ~60 days before calving






6. Superior genes are _______ to multiply






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






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






9. 24 hours before end of estrus cycle






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






11. ~305 days (altough often longer due to breeding difficulties)






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






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






14. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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15. Why does estrus happen before ovulation?






16. Animal which has been castrated after puberty






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






18. What helps regulate spermatogenesis?






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






20. Parturition is controlled by...






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






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






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






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






25. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






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






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






28. 14-19 (17) days






29. Parturition is controlled by...






30. 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






31. Larger the cow - more milk is produced; smaller the cow - less milk is produced






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






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






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






35. Important 'landmark' during palpation






36. Provide nourishment for the developing sperm






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






38. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






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






40. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






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






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






43. Actual heat cycle (period)






44. Male on one pin and female on other side






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






46. 2 month growth cycle. stored in the epididymis of the bull






47. 1-3 days






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






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






50. Allows extension of penis without fibro-elastic penis