Ag Test 3

Question 0

Fertilization

Answer 0

Union of sperm and egg

Question 1

Puberty

Answer 1

Time at which animals reach a level of sexual development that makes them CAPABLE OF REPRODUCTION

(Just because they have reached puberty, doesn’t mean you need to breed them, bodies are small)

Question 2

Gestation

Answer 2

Period of pregnancy

Conception/fertilization-parturition

Question 3

Parturition

Answer 3

Process of giving birth

Baby should look like diving, w nose and two front legs

Gets tricky if multiple animals inside, livestock lay down
L

Question 4

Lactation

Answer 4

Production of milk

Question 5

Colostrum

Answer 5

First milk(24 hrs) given by animal after parturition, contains important antibodies to help provide disease resistance to young
Very nutritious
Thick

Question 6

Weaning

Answer 6

Removing from milk diet, getting onto solid foods

Sometimes need to physically remove/ separate from mother

Question 7

Reproductive efficiency

Answer 7

The timely and prolific (at least have offspring, sometimes multiple) replacement of a species

Difference between success and failure in animal production

Question 8

Purebred animal

Answer 8

One that is eligible for registry in a breed association

Riley and Hampshire sheep

Question 9

Cross breeding

Answer 9

Purebred animals of the same species, but of different breeds are mated

Red gal-Hereford, angus, Holstein

Question 10

Breeding

Answer 10

Promoting of animal reproduction so that the desired offspring result

Question 11

Conception

Answer 11

The fertilization of an egg to create new life

Question 12

Why is animal reproduction important to manage for the industry?

Answer 12

If we are going to use animals, we need to keep making more

Animals that can breed, give birth, and raise animals are valuable(income) keeping food prices affordable

Question 13

Cull

Answer 13

(Older animal) Remove from herd/flock to become pet or to slaughter for pet food

Question 14

Sexual reproduction

Answer 14

Union of sperm and egg with a new animal beginning at union

Male-sperm, female-egg

Question 15

Bred

Answer 15

Pregnant

Question 16

Estrous cycle

Answer 16

Time between ovulates (fertile every)
Sheep 17 days
Cattle 21 days
(Female)

Question 17

Estrus “in heat”

Answer 17

When physically ovulating (not as humans) will release egg, will mount other females, will become noisy, last 24hrs, this is when you breed

Question 18

Afterbirth

Answer 18

Also called placenta

White sac/fluid

Question 19

Ovulation

Answer 19

Releasing of egg out of ovary and wait for sperm(but not for very long)
Ovary-eggs
Female born with all eggs she will ever have
Entire reproductive tract inside body, need surgery to remove

Question 20

Breeding styles

Answer 20

Natural-how we breed beef in us, beef cattle on range, ram breeds ewes, fencing (w/ram) big issue
Artificial insemination- buy straw of semen in catalogue, don’t keep male, choose superior genetics
(Lejaculate= 200 straws 3x per week)

Question 21

Male reproduction

Answer 21

Testicles/scrotum connected w two tiny cords w blood stream for sperm to travel
Sperm has to move forward and be alive
1 sperm per million

Question 22

Castration

Answer 22

Hard rubber band near body, cut off blood supply, will dry up and fall off, day 18(in sheep), less then 30 sec, bloodless, tissue is killed

Question 23

A.i technicians

Answer 23

Manpower need to insert semen
Artificial insemination-cost effective
90% dairy cattle