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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. Failure to have one testis (gonad) to descend






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






4. 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.






5. 265-285 days






6. (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






7. ~305 days (altough often longer due to breeding difficulties)






8. Why does estrus happen before ovulation?






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






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






11. 4-6 days






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






13. ~60 days before calving






14. Sperm production






15. 19-23 (21) days






16. Actual heat cycle (period)






17. What makes the milk flow through the mammary glands?






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






19. ~305 days (altough often longer due to breeding difficulties)






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






21. 147 days






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






23. 114 days






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






25. 336 days






26. Scar tissue plugs up chambers of udder






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






28. Animal which has been castrated after puberty






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






30. Why Dairy calves are fed powdered milk.






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






32. 16-20 hours






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






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






35. 336 days






36. Allows extension of penis without fibro-elastic penis






37. Scar tissue plugs up chambers of udder






38. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






39. 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






40. 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






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






42. 1-2 days






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






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






45. Birthing process (termination of gestation)






46. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






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






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






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






50. (FSH) causes egg to mature in females