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ANS II Large 7.00 Exam Review

Total questions: 38

Worksheet time: 19mins

Name
Class
Date
1.

The gene in a pair that hides the effect of the other gene is a:

a)

dominant gene

b)

homozygous gene pair

c)

punnett square

d)

recessive gene

2.

A gene pair that carries two genes for the same trait is:

a)

blood-typing

b)

expected progeny

c)

heterozygous

d)

homozygous

3.

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

a)

father to daughter

b)

father to son

c)

mother to daughter

d)

mother to son

4.

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:

a)

X

b)

XX

c)

XY

d)

YY

5.

Based on the Punnet Square, what percent of the calves would have horns if a bull with heterozygous genes for horns (Pp) were mated with a cow with heterozygous genes for horns (Pp)?

a)

0

b)

25

c)

75

d)

100

6.

Using the Punnet Square, what percent of the offspring would be black if a white heterozygous (Ww) boar is bred to a white heterozygous (Ww) sow?

a)

0

b)

25

c)

50

d)

100

7.

For a cow to have horns, the gene pair must be:

a)

crossbred

b)

dominant

c)

heterozygous and dominant

d)

recessive and homozygous

8.

In livestock, sex-linked traits are often recessive and are covered up by:

a)

dominant genes

b)

female hormones

c)

male hormones

d)

recessive genes

9.

Using the Punnet Square, what percent of the offspring would be white if a dominant white homozygous (WW) boar is bred to a black recessive homozygous (ww) sow?

a)

0

b)

25

c)

75

d)

100

10.

A polled bull bred to a polled cow that produces a calf that has horns is an example of:

a)

meiosis

b)

mitosis

c)

purebred breeding

d)

recessive genes

11.

If black is dominant over red and white faces are dominant over colored faces in cattle, what color offspring would come from crossing a purebred black Angus bull with a purebred white-faced, red Hereford cow?

a)

black all over

b)

black with white face

c)

red all over

d)

red with white face

12.

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?

a)

0

b)

25

c)

75

d)

100

13.

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)?

a)

0

b)

25

c)

50

d)

100

14.

The appearance of a new trait in the biological offspring that is not in the genetic makeup of the parents is a:

a)

dominant gene

b)

mutation

c)

recessive gene

d)

sex-linked trait

15.

The gene in a pair that is hidden by the other gene is a:

a)

dominant gene

b)

homozygous gene pair

c)

phenotype gene

d)

recessive gene

16.

If a polled cow bred to a polled bull produces a calf with horns, the parents’ genotypes are:

a)

dominant

b)

heterozygous

c)

homozygous

d)

purebred

17.

A gene pair that carries two different genes that affect a trait is:

a)

blood-typing

b)

heterozygous

c)

homozygous

d)

pure-breeding

18.

The tendency for genes that are located close together on the chromosome to stay together and pass traits in groups is:

a)

crossover

b)

incomplete dominance

c)

linkage

d)

mutation

19.

The situation in which one gene doesnot completely hide the effect of the other gene in a gene pair is:

a)

dominant

b)

homozygous

c)

incomplete dominance

d)

recessive

20.

If the percent heritability of calving interval for a female beef cow is 10 percent, selecting females whose mother has outstanding calving interval records would affect calving intervals of the herd very:

a)

fast

b)

little

c)

much

d)

slowly

21.

The only sure way to determine the ability of an individual bird to transmit genes for a desired characteristic to most of its sons and daughters is a:

a)

culling test

b)

feeding test

c)

mortality test

d)

progeny test

22.

Which performance data is a measure of growth and gain performance for beef cattle?

a)

calf crop percentage born

b)

calving interval

c)

conception rate

d)

weaning weights

23.

Which performance data is a measure of growth rate in swine?

a)

adjusted days to 230 pounds

b)

number of live pigs born per litter

c)

number of pigs weaned per litter

d)

USDA grade

24.

Scrotum circumference is part of the performance data provided in advertisement information for:

a)

boars

b)

bulls

c)

heifers

d)

steers

25.

A bull with an Estimated Breeding Value (EBV) of +60 pounds for yearling weight would have an Expected Progeny Difference (EPD) of +30 pounds because:

a)

all this trait comes from the mother

b)

half the trait comes from the mother

c)

percent heritablilty is 30%

d)

percent heritability is 50%

26.

The formula that includes number of pigs born alive and adjusted 21-day litter weight for individual sows compared to a contemporary group of sows is the:

a)

general gilt index

b)

growth rate index

c)

heritability estimates index

d)

sow productivity index

27.

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

a)

maternal milk

b)

yearling weight

c)

weaning weight

d)

birth weight

28.

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

a)

adjusted to 21 day litter weaning weight

b)

adjusted backfat at 230 pounds

c)

adjusted days to 230 pounds

d)

number of live pigs born per liter

29.

For superior individuals and outstanding performers in a pedigree to be meaningful, they should be:

a)

close up in the lineage

b)

four generations removed

c)

names fancy names

d)

several generations back in the lineage

30.

If each bird in the flock is a high performer, the most effective present performance selection method for breeding stock is:

a)

culling

b)

family selection

c)

individual selection

d)

pedigree

31.

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

a)

adjusted backfat

b)

pedigree

c)

pounds of gain per day on feed

d)

USDA Grade

32.

If the percent of heritability for birth weight is 40, weaning weight is 30, tenderness is 60, and ribeye area is 70 in beef cattle, which trait can be improved the mostthrough selective breeding?

a)

Birth weight

b)

Ribeye area

c)

Tenderness

d)

Weaning weight

33.

If four bulls are on the same performance test, which average daily gain ratios (ADG Rat.) is the best?

a)

108

b)

102

c)

100

d)

97

34.

Which performance data is a measure of sow productivity?

a)

adjusted backfat at 203 pounds

b)

adjusted days to 230 pounds

c)

number of live pigs born per litter

d)

pounds of feed per pound of gain

35.

When the performance information used to select poultry breeders is the pedigree, the type of record used is:

a)

future performance

b)

past performance

c)

present performance

d)

rate-of-gain performance

36.

In poultry performance data, a breeding test or a progeny test to determine the ability of a bird to transmit genes for desired characteristics to most of its progeny is an example of:

a)

future performance

b)

past performance

c)

present performance

d)

rate of gain performance

37.

Which performance data is a measure of reproduction performance for beef cows?

a)

birth weight related to calving difficulty

b)

carcass grade

c)

efficiency of gain

d)

rib eye area

38.

If four bulls have the same pedigree and look the same but their Expected Progeny Differences (EPD) for weaning weight are –34.2,–18.0, +10.5, and +36.9, the bull with which EPD should be selected as the sire to most improve the calf weaning weight in the herd?

a)

-34.2

b)

-18

c)

+10.5

d)

+36.9