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WorksheetsANS II Large 7.00 Exam Review
Total questions: 38
Worksheet time: 19mins
The gene in a pair that hides the effect of the other gene is a:
dominant gene
homozygous gene pair
punnett square
recessive gene
A gene pair that carries two genes for the same trait is:
blood-typing
expected progeny
heterozygous
homozygous
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
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
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)?
0
25
75
100
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?
0
25
50
100
For a cow to have horns, the gene pair must be:
crossbred
dominant
heterozygous and dominant
recessive and homozygous
In livestock, sex-linked traits are often recessive and are covered up by:
dominant genes
female hormones
male hormones
recessive genes
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?
0
25
75
100
A polled bull bred to a polled cow that produces a calf that has horns is an example of:
meiosis
mitosis
purebred breeding
recessive genes
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?
black all over
black with white face
red all over
red with white face
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
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
The appearance of a new trait in the biological offspring that is not in the genetic makeup of the parents is a:
dominant gene
mutation
recessive gene
sex-linked trait
The gene in a pair that is hidden by the other gene is a:
dominant gene
homozygous gene pair
phenotype gene
recessive gene
If a polled cow bred to a polled bull produces a calf with horns, the parents’ genotypes are:
dominant
heterozygous
homozygous
purebred
A gene pair that carries two different genes that affect a trait is:
blood-typing
heterozygous
homozygous
pure-breeding
The tendency for genes that are located close together on the chromosome to stay together and pass traits in groups is:
crossover
incomplete dominance
linkage
mutation
The situation in which one gene doesnot completely hide the effect of the other gene in a gene pair is:
dominant
homozygous
incomplete dominance
recessive
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:
fast
little
much
slowly
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:
culling test
feeding test
mortality test
progeny test
Which performance data is a measure of growth and gain performance for beef cattle?
calf crop percentage born
calving interval
conception rate
weaning weights
Which performance data is a measure of growth rate in swine?
adjusted days to 230 pounds
number of live pigs born per litter
number of pigs weaned per litter
USDA grade
Scrotum circumference is part of the performance data provided in advertisement information for:
boars
bulls
heifers
steers
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:
all this trait comes from the mother
half the trait comes from the mother
percent heritablilty is 30%
percent heritability is 50%
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:
general gilt index
growth rate index
heritability estimates index
sow productivity index
The EPD trait that predicts the average size of calves is:
maternal milk
yearling weight
weaning weight
birth weight
Which performance data is a measure of sow productivity that combines numbers of pigs weaned and milk production?
adjusted to 21 day litter weaning weight
adjusted backfat at 230 pounds
adjusted days to 230 pounds
number of live pigs born per liter
For superior individuals and outstanding performers in a pedigree to be meaningful, they should be:
close up in the lineage
four generations removed
names fancy names
several generations back in the lineage
If each bird in the flock is a high performer, the most effective present performance selection method for breeding stock is:
culling
family selection
individual selection
pedigree
Which performance data is a record of the animal’s ancestry?
adjusted backfat
pedigree
pounds of gain per day on feed
USDA Grade
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?
Birth weight
Ribeye area
Tenderness
Weaning weight
If four bulls are on the same performance test, which average daily gain ratios (ADG Rat.) is the best?
108
102
100
97
Which performance data is a measure of sow productivity?
adjusted backfat at 203 pounds
adjusted days to 230 pounds
number of live pigs born per litter
pounds of feed per pound of gain
When the performance information used to select poultry breeders is the pedigree, the type of record used is:
future performance
past performance
present performance
rate-of-gain performance
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:
future performance
past performance
present performance
rate of gain performance
Which performance data is a measure of reproduction performance for beef cows?
birth weight related to calving difficulty
carcass grade
efficiency of gain
rib eye area
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?
-34.2
-18
+10.5
+36.9
