ANS II 7.0-1 Exam Review

Using the Punnet Square, what percent of calves would have horns if a homozygous polled (PP) bull were crossed with a homozygous polled (PP) cow?

• 0

• 25

• 75

• 100

If a hen’s abdomen is soft and pliable and the vent is moist, bleached, and enlarged, the hen is:

• about ready to start laying eggs.

• currently laying eggs.

• not currently laying eggs.

• unable to lay eggs.

Which performance data is a record of the animal’s ancestry?

• Adjusted backfat

• Pedigree

• USDA Grade

• Pounds of gain per day on feed

In livestock, the traits on the portion of the Y chromosome that do not link with the X chromosome are transmitted only from:

• father to daughter.

• father to son.

• mother to daughter.

• mother to son.

Based on the Punnet Square, what percent of calves would have horns if a bull with homozygous dominant genes for polled (PP) were mated with a cow with homozygous recessive genes for horned (pp)?

• 0

• 25

• 50

• 100

Compared to purebred breeders, commercial livestock producers place more emphasis on:

• breed character.

• color.

• pedigree.

• performance records.

After meiosis, one half the sperm carry an X chromosome, one half carry a Y chromosome, and all the ova carry an X chromosome. The chromosome combination that produces a male offspring in mammals is:

• X.

• XX.

• XY.

• YY.

Which performance data is a measure of sow productivity that combines numbers of pigs weaned and milk production?

• Adjusted 21 day litter weaning weight

• Adjusted backfat at 230 pounds

• Adjusted days to 230 pounds

• Number of live pigs born per litter

Which performance data is a measure of sow productivity?

• Adjusted backfat at 230 pounds

• Adjusted days to 230 pounds

• Number of live pigs born per litter

• Pounds of feed per pound of gain

The EPD trait that predicts the average size of calves is:

• maternal milk.

• yearling weight.

• weaning weight.

• birth weight.