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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. To remove/separate testicles from animal's body before animal reaches puberty






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






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






4. 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.






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






6. 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






7. 45-60 days after breeding; re-breed as required






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






9. Male on one pin and female on other side






10. 24 hours before end of estrus cycle






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






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






13. 26 hours after estrus begins






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






15. 1. brain function - 2. blood flow - 3. willing female






16. 4-6 days






17. 14-19 (17) days






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






19. 30 hours after estrus begins






20. ~60 days before calving






21. 336 days






22. FEED






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






24. 10-37 (21) days






25. Scar tissue plugs up chambers of udder






26. (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






27. 4-6 days






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






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






30. 1-2 days






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






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






33. Superior genes are _______ to multiply






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






35. Failure to have both testis (gonads) descend






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






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






38. What helps regulate spermatogenesis?






39. Why Dairy calves are fed powdered milk.






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






41. To remove/separate testicles from animal's body before animal reaches puberty






42. 45-60 days after breeding; re-breed as required






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






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






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






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






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






48. 1. brain function - 2. blood flow - 3. willing female






49. Urinary calculi.






50. Parturition is controlled by...