Test your basic knowledge |

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. (male) pushes the testes outward toward the legs for a cool-down off of the body






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






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






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






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






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


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






8. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






9. ~60 days before calving






10. 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.






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






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






13. 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.






14. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






15. Luteolysis happens because of the ____________ hormone






16. 114 days






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






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






19. 1-2 days






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






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






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






23. 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.






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






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






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






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






28. Male on one pin and female on other side






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






30. Produce testosterone. located between the seminiferous tubules






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






32. Why does estrus happen before ovulation?






33. 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.






34. 1-3 days






35. 283 days






36. Contains and regulates the temp of the testes for sperm production






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






38. 16-20 hours






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






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






41. 2 month growth cycle. stored in the epididymis of the bull






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






43. 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






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






45. Implies the amount of estrogen production






46. Parturition is controlled by...






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






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






49. FEED






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