Genetics 1
You are selecting A1 sires based on the goal of making replacement females. Which of the following EPDs/ indexes should not be a part of your selection process?
a. STAY
b. DOC
c. MARB
d. TI
d. TI
Which of the following would have a positive effect on the USDA Yield Grades of an animal's terminal offspring?
a. A higher than average Marbling EPD
b. A lower than average Marbling EPD
c. A higher than average Back Fat EPD
d. A lower than average Back Fat EPD
e. Both A and D
d. A lower than average Back Fat EPD
(Use Percentage Heifer Show Info)
Which female would you expect to have the highest EPD accuracies?
Female A
Female B
Female C
Female D
Female E
Female B
Which common beef production method most increased the need for multi- breed genetic evaluations?
a. Embryo Transfer
b. Selective Breeding
c. Using Economic Indexes
d. Crossbreeding
d. Crossbreeding
(Use Intermediate Genetic Quiz 1 Bull Info)
Which bull would you expect to produce offspring with the most post-weaning gain?
A. CDI Mainline 265D
B. GW-WBF Substance 820Y
C. TJ Teardrop 783F
D. W/C Executive 187D
E. WHF Ten High C247
B. GW-WBF Substance 820Y
Animals with low EPD accuracies are expected to have no more variation in their calf crops than those with high EPD accuracies.
a. True
b. False
a. True
You are using your heterozygous black herd sire on a group of 38 females. Six of these females are homozygous black, 20 are heterozygous black, and 12 are homozygous red. Assuming 100% conception and calf survival rates, how many black calves should you expect to have?
a. 27
b. 28
c. 30
d. 32
a. 27
(Use Percentage Heifer Show Info)
Female A ranks in the 15th Percentile for Weaning Weight. What does this mean?
a. Her WW EPD may change by as much as 15%.
b. Her WW EPD may change by as much as 85%.
c. She ranks ahead of 15% of the breed for WW.
d. She ranks ahead of 85% of the breed for WW.
d. She ranks ahead of 85% of the breed for WW.
Which of the following statements about Genomic Enhanced EPDs is true?
a. By adding genomic information to an animal's EPD, the percentile rank of that EPD should increase.
b. By adding genomic information to an animal's EPD, the actual value of that EPD should increase.
c. By adding genomic information to an animal's EPD, the accuracy of that EPD should increase.
d. All of the above are true
c. By adding genomic information to an animal's EPD, the accuracy of that EPD should increase.
(Use Intermediate Genetic Quiz 1 Bull Info)
Within Contemporary Group 1, seven calves sired by Bull E have an average WW ratio of 109. What would you expect of the five calves sired by Bull B?
a. They should have a higher average WW ratio.
b. They should have a lower average WW ratio.
c. They should have a similar average WW ratio.
d. None of the above. A contemporary group cannot contain multiple sire groups.
e. None of the above. A contemporary group must contain equal numbers of calves for each sire.
a. They should have a higher average WW ratio.
Because they account for environmental effects, so that the remaining differences can be attributed to genetics, _______ are the cornerstone of genetic evaluation.
a. progeny reports
b. ratios
c. contemporary groups
d. performance records
c. contemporary groups
The sires used in the three most recent generations contribute _______ of the genetic makeup of a calf.
a. 87.5%
b. 75%
c. 62.5%
d. 50%
a. 87.5%
(Use Percentage Heifer Show Info)
Compared to Female D, how much more valuable is Female C when used in a program that retains replacement heifers and sells the rest of the calves on grade and yield?
a. $12.70 per calf
b. $1270 total
c. $16.60 per calf
d. $1660 total
e. None of the above. Female D is more valuable
a. $12.70 per calf
(Intermediate Genetic Quiz 1- Image 1)
Due to a record keeping error, you are unsure of a calf’s AI sire. However, you can confidently narrow it to three possibilities. You submit DNA on the calf and its dam. Combined with the sire information already on file, you may be able to identify the calf’s sire.
Which bull is it?
Locus 1 Locus 2 Locus 3 Locus 4 Locus 5
Dam: AA bb Cc DD Ee
Calf: Aa bb cc DD ee
a. Sire A: Aa Bb Cc DD EE
b. Sire B: aa bb Cc DD ee
c. Sire C: Aa BB Cc dd ee
d. Multiple sires not excluded. More information is needed.
b. Sire B
(Use Intermediate Genetic Quiz 1 Bull Info)
Each of these bulls could sire calves that are 37.5% Simmental.
a. True
b. False
a. True
A 3/4 Simmental 1/4 Angus cow is bred to a 1/2 Simmental 1/2 Angus bull, resulting in a heifer calf. That heifer is then bred to a Purebred Simmental calving ease bull. By ASA standards, what will be the breed composition of her first calf?
a. 1/2 SM 1/2 AN
b. 5/8 SM 3/8 AN
c. 3/4 SM 1/4 AN
d. PB SM
c. 3/4 SM 1/4 AN
(Use Percentage Heifer Show Info)
Which female's daughters would you expect to be most likely to experience dystocia as first-calf heifers?
Female A
Female B
Female C
Female D
Female E
Female E
When selecting bulls for calving ease, you should emphasize the BW and CE EPDs equally.
a. True
b. False
b. False
(Use Intermediate Genetic Quiz 1 Bull Info)
Which bull would you expect to produce daughters with the most reproductive longevity?
A. CDI Mainline 265D
B. GW-WBF Substance 820Y
C. TJ Teardrop 783F
D. W/C Executive 187D
E. WHF Ten High C247
A. CDI Mainline 265D
(Use Intermediate Genetic Quiz 1 Bull Info)
As the YG EPD of Bull A increases in accuracy, what would you expect its best possible value to be?
a. -0.29
b. -0.33
c. -0.49
d. -0.53
e. -0.57
d. -0.53
Cow L has a yearling weight EPD that ranks in the 75% Percentile. Cow M has a yearling weight EPD that ranks in the 10th Percentile. On average, which female should produce offspring that more consistently outperform their contemporaries at 365 days of age?
a. Cow L
b. Cow M
c. There will be no measurable difference.
d. Not enough information is available
b. Cow M
(Use Percentage Heifer Show Info)
Which female would you expect to produce terminal offspring with the lowest cutability?
Female A
Female B
Female C
Female D
Female E
Female C
A cow with a BW EPD of -1.5 is bred to a bull with a BW EPD of 2.5. Without gathering any additional information, what is the best estimate of the resulting calf's BW EPD?
a. 1.0
b. 0.5
c. 0.0
d. -0.5
e. Not enough information is available
b. 0.5
(Use Intermediate Genetic Quiz 1 Bull Info)
Which bull would you expect to produce daughters whose offspring experience the least pre-weaning gain due to milk and growth?
A. CDI Mainline 265D
B. GW-WBF Substance 820Y
C. TJ Teardrop 783F
D. W/C Executive 187D
E. WHF Ten High C247
E. WHF Ten High C247
(Use Intermediate Genetic Quiz 1 Bull Info)
How many of these bulls are definitely homozygous polled by pedigree?
a. 1
b. 2
c. 3
d. 4
e. 5
c. 3