ANSC 301

Quiz questions

Which of the following technological advancements is typically used in engineering livestock?

CRISPR-Cas9

Paylean (Ractopamine) is a beta agonist that is still commonly used in pork production in the U.S.

False

Which of the following legislative acts in California called for changes in confinement housing for veal calves, swine, and egg-laying hens?

Prop 12

Quality grade is most important factor when ranking beef carcasses. 

True

Which of the following is a nutritional benefit of red meat for human consumption?

Good source of zinc

Please list one element that should be considered when thinking about animal housing.

Animal Space

Businesses in California are not allowed to knowingly sell eggs or uncooked pork or veal that came from animals that do not meet animal housing standards.

True

The beta-agonist Paylean is approved for use in international markets.

False

The amount of estrogen in 1 lb. of implanted beef is more than what is in 1 lb. of ice cream.

False

Which of the following ruminant emissions causes the most concern from a greenhouse gas perspective?

Methane

Which of the following describes why some livestock producers use medicated feeds?

increase growth

promote a healthier digestive environment

improve feed efficiency

Which of the following describes a way that genetic engineering could be beneficial to livestock?

improve tolerance to heat, increase protein accretion to increase muscle, improve disease resistance

More land in the world is used for crop production than livestock production.

False

Which is more impactful: a quality grade premium or a yield grade discount?

Quality grade premium

Which of the following describes a way that livestock land use impacts the environment?

Decrease in available forest area for more pastureland

Carcass traits have high heritability.

True

Which of the following values is not needed to calculate BCTRC?

KPH

What is an estimated breeding value?

Measurement of the genetic potential of an animal for a trait

If not explained by genetics, differences in animals explained by __________.

Environment

Which of the following finishing diets tends to produce a more intense flavor profile, often referred to as “gamey”?

High-quality forage with no supplemental grain

Which carcass is more ideal?

2.3" ribeye, 0.10" backfat, 0.75" body wall, low choice flank streaking

When ranking sheep carcasses, what should be your guiding principle?

Trimmest are best

In the BCTRC equation, if the ribeye area increases, what is the effect on BCTRC?

Increase

Body wall is a measurement of:

Rib + fat

In the BCTRC equation, if the body wall increases, what is the effect on BCTRC?

Decrease

What type of joints do mutton have?

Spool

In the BCTRC equation, if the backfat decreases, what is the effect on BCTRC?

Increase

Backfat is measured 75% up the ribeye on a lamb carcass.

False

Which of the following is not a meat breed of sheep?

Romney

Which of the following finishing diets poses a higher risk of acidosis and rancidity?

Backgrounded on pasture and moved to grain finishing

What association did Luke Bowman work for at the time the interview was recorded?

American Simmental Association

Which is considered a skeletal defect in sheep?

Sickle-hocked

Why is live evaluation and selection so important in cattle?

It takes a longer time to make improvements

Cattle take a longer time to make money bakc

Longest gestation interval

What is the correct equation for % calf crop?

(# of calves weaned/ # cows exposed) x 100

Which is a desired characteristic in swine?

Relaxed, loose shoulder blade

What is not a consequence of a BCS of 8 or 9?

Higher conception rates

Which of the following is not a carcass characteristic in swine?

Litter weight

Which of the following is not a maternal EPD?

Yearling weight

What is capacity (spring and depth of rib) associated with in cattle?

Higher performance

How many functional teats on each side are required for the underline of swine to be considered acceptable?

6

What does 60 d weight indicate in sheep?

Ewe's milking ability

Why was the National Sheep Improvement Federation developed?

To provide sheep producers with a way of genetically evaluating their animals for maternal, growth, and wool traits within flocks

What impacts feed efficiency in swine?

Feed intake over maintenance

Environment

Composition of gain

Where is the loin located on beef, sheep, and swine?

Directly before the rump

What is capacity (spring and depth of rib) associated with in cattle?

Higher performance

What does EPD stand for in regards to genetic selection?

Expected Progeny Differences

Which of the following describes sick pigs? (Click all that apply)

More expensive to care for

Reduced appetite

Reduced gains

The key factors or pork carcass evaluation are the same as what is needed to calculate percent fat free lean.

True

Which of the following pork primal cuts is not a lean cut?

Belly

Loin eye area is an important factor determining pork yield.

True

Trimmer, heavier muscled carcasses are preferred for pork.

True

Loin eye area is an important factor determining pork quality.

False

What does PSE stand for in regards to pork quality?

Pale, soft, exudative

Ractopamine is approved for use as a supplement in the U.S.

True

Which of the following is an indicator of pork carcass muscling if the carcass is unribbed?

Shoulder

Ham

Loin

If carcasses are similar in trimness, they are then ranked on _______.

Muscling

Which back fat can be measured more accurately when a pork carcass is ribbed?

10th rib

__________ is the observable characteristics in animals.

Phenotype

Which of the following best describes ideal pork quality?

Red, firm, normal