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






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






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






4. 283 days






5. Luteolysis happens because of the ____________ hormone






6. 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)






7. Birthing process (termination of gestation)






8. 16-20 hours






9. 24 hours before end of estrus cycle






10. ~60 days before calving






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






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






13. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






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






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






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






17. 1-3 days






18. Scar tissue plugs up chambers of udder






19. (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






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






21. Male on one pin and female on other side






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






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






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






25. 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






26. Days which have increasing daylight hours

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27. Superior genes are _______ to multiply






28. (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






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






30. ~305 days (altough often longer due to breeding difficulties)






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






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






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






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






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






36. Animal which has been castrated after puberty






37. Produce testosterone. located between the seminiferous tubules






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






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






40. Parturition is controlled by...






41. 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.






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






43. Duct through penis that carries sperm and urine






44. 283 days






45. 4-6 days






46. Male on one pin and female on other side






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






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






49. 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.






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