Beef Genetics

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BEEF
GENETICS
NEXT
What color are Shorthorns?
A
A.
B.
B
C
C.
D
D.
White
Red
Roan
All the above
NEXT
Santa Gertrudis is a mixture of
what 2 breeds?
A
A.
B.
B
C
C.
D
D.
Shorthorn and Brahman
Angus and Brahman
Red Angus and Shorthorn
Red Poll and Beefmaster
NEXT
Which will finish quicker heifers,
steers, or bulls?
A Heifers
A.
B.
B Steers
C Bulls
C.
NEXT
What is the highest possible
quality grade?
A.
A
B.
B
C
C.
D
D.
Prime
Choice
Select
Standard
NEXT
How is Quality grade
determined?
A
A.
B.
B
C
C.
D
D.
Degree of external fat
Degree of intra-muscular fat
Ribeye area
Carcass size
NEXT
Marbling by definition is ______.
A
A.
B.
B
C
C.
D
D.
Round shape of the bone
Intra-muscular fat
Ribeye area size
Foot size
NEXT
How do cattle progress in getting
fat?
A
A.
B.
B
C
C.
D
D.
Back to front
Front to back
Bottom to top
Inside out
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Terminal crossing system means
...
A 10 % of offspring are kept as
A.
replacements.
B All heifers will be kept.
B.
C All offspring will be sold to market
C.
D.
D All steers will be sold to market.
NEXT
A farmer buying a bull for
terminal crossing would put more
emphasis on which traits?
A
A.
B.
B
C
C.
D
D.
Growth and carcass
Maternal and milk
Maternal and growth
Milk and carcass
NEXT
Which of these is a terminal breed of
cattle?
A
B
C
D
Angus
Hereford
Limousin
Shorthorn
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What does the term contemporary group
mean?
A A group of cattle that are uniform in
age and management
B A group of cattle that is new to the
farm
C A group of cattle that is much smaller
than the rest of the herd
D A group of bulls that are used to
increase conception rate
Polled cattle have ______.
A
A.
Horns
B
B. No horns
C
C. A shallow body
D
D. twins
NEXT
A heifer twin to a bull is referred
to as a _____.
A
A.
B.
B
C
C.
D
D.
Big sister
Little sister
Step sister
Free martin
NEXT
Which color in cattle is
dominant?
A
A.
B.
B
C
C.
D
D.
Red
Black
White
Roan
NEXT
Which color in cattle is
recessive?
A
A.
B.
B
C
C.
D
D.
Red
Black
White
Purple
NEXT
Line-breeding is a form of _____.
A
A.
B
B.
C
C.
D
D.
Crossbreeding
In-breeding
Confusion
Out crossing
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Heterosis is the advantage
received from ______.
A
A.
B.
B
C
C.
D
D.
Crossbreeding
In-breeding
Line-breeding
A father-daughter mating
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Crossbreeding improves traits
_____ in heritability.
A
A.
B.
B
C
C.
D
D.
High
Medium
Low
Extremely high
NEXT
100% heterosis can improve
growth by as much as ______.
A
A.
B.
B
C.
C
D
D.
2-4%
6-8%
10-12%
20-25%
NEXT
Why would a purebred breeder
practice in-breeding?
A Check a line for genetic faults
A.
B.
B Improve genetic consistency
C Cannot find outside genetics
C.
capable of making improvement
D All the above
D.
NEXT
REA is an abbreviation for
_____.
A
A.
B.
B
C
C.
D
D.
Real beef
Natural beef
Ribeye area
Marbling
NEXT
YW represents which EPD?
A
A.
B.
B
C
C.
D
D.
Yearling weight
Inter-muscular fat
Yield grade
Scrotal circumference
NEXT
BW represents which EPD?
A
A.
B.
B
C
C.
D
D.
Born Alive
Marbling
Longevity
Birth weight
NEXT
WW represents which EPD?
A
A.
B.
B
C
C.
D
D.
Calving interval
Milk
Weaning weight
Yearling weight
NEXT
EPD is an abbreviation for ____.
A
A.
B
B.
C
C.
D
D.
Excellent progeny decisions
Expected progeny difference
Exception proof of difference
Accuracy
NEXT
MARB refers to which EPD?
A
A.
B.
B
C
C.
D
D.
More ribeye are
Quality grade
Yield grade
Marbling
NEXT
ACC may be the most important
abbreviation considered when
evaluating EPD’s. What does it
represent?
A
A.
B
B.
C
C.
D
D.
Breeder accountability
Accuracy
All EPD’s combined
A new longevity EPD
NEXT
What does the term terminal sire mean?
A This sire needs to be slaughtered for
meat.
B All offspring from this bull will be sold
for slaughter.
C Some offspring will be kept as
replacements and the rest will be
slaughtered.
D All offspring will be kept as
replacements.
NEXT
Which of these is not a maternal breed of
cattle?
A
B
C
D
Angus
Shorthorn
Hereford
Charolais
NEXT
What is the largest framed breed of
cattle?
A
B
C
D
Shorthorn
Limousin
Chianina
Red Angus
NEXT
Which of these breeds can never be
black in color?
A
B
C
D
Angus
Brangus
Charolais
Limousin
NEXT
Which of these breeds is not red in
color?
A
B
C
D
Hereford
Brangus
Tarentaise
Red Angus
NEXT
Which of these breeds is not white or
gray in color?
A
B
C
D
Charolais
Santa Gertrudis
Belgian Blue
Murray Grey
NEXT
Which of these is considered the heaviest
muscled breed of beef cattle?
A
B
C
D
Belgian Blue
Texas Longhorn
Angus
Hereford
NEXT
Which of these is considered the lightest
muscled breed of beef cattle?
A
B
C
D
Limousin
Chianina
Texas Longhorn
Angus
NEXT
What breeds can be crossed to make a
blue roan?
A
B
C
D
Angus and Shorthorn
Charolais and Limousin
Angus and Hereford
Shorthorn and Hereford
NEXT
What percentage of Brahman blood are
the Brangus, Simbrah, and Santa
Gertrudis breeds of cattle?
A
B
C
D
1/8
5/8
3/8
7/8
NEXT
What breeds are crossed to make a
Beefmaster?
A Brahman, Shorthorn, and Hereford
B Santa Gertrudis, Shorthorn and
Braford
C Chianina, Hereford, and Angus
D Texas Longhorn, Simmental, and
Maine Anjou
NEXT
What breed of cattle is known for
producing the lightest calves at birth?
A
B
C
D
Angus
Texas Longhorn
Chianina
Gelbvieh
NEXT
What does MPPA stand for?
A
B
C
D
Most Probable Producing Ability
More People Produce Angus
Most Phenotypic Production Ability
Muscle, Performance, Production,
Accuracy
NEXT
All of these are factors to consider when
adjusting 205 day weights except
________.
A
B
C
D
Birth Weight
Age at Weaning
Age of Dam
Amount of Feed/Day
NEXT
Which of these traits is not evaluated
with EPD’s?
A
B
C
D
Birth Weight
Weaning Weight
Frame Size
Yearling Weight
NEXT
Horn tissue that never attaches to the
scull is called _________.
A
B
C
D
Longhorns
Scurs
Buds
Horn Cartilage
NEXT
If a scurred cow has a bull calf sired by a
homozygous polled bull, what will be the
horn status of the calf?
A Horned
B Polled
C Scurred
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A genetic abnormality that causes muscle
hypertrophy is called __________.
A
B
C
D
Light muscled
Muscular atrophy
Double muscled
Super muscled
NEXT
As your calf gets fatter, will dressing
percentage increase or decrease?
A Increase
B Decrease
NEXT
Which bull would be the best to
breed to heifers?
BW WW MILK REA MARB YW
A 2.4
A.
30
13 .49 -.32
61
B 5.6
B.
48
10 -.01
.15
98
C 0.5
C.
28
21 .11
.62
70
D 3.4
D.
43
19 .34 -.12
88
NEXT
Which bull will sire the most
growth?
BW WW MILK REA MARB YW
A 2.4
A.
30
13 .49 -.32
61
B 5.6
B.
48
10 -.01
.15
98
C 0.5
C.
28
21 .11
.62
70
D 3.4
D.
43
19 .34 -.12
88
NEXT
Which bull will sire the lightest
calves at weaning?
BW WW MILK REA MARB YW
A 2.4
A.
30
13 .49 -.32
61
B 5.6
B.
48
10 -.01
.15
98
C 0.5
C.
28
21 .11
.62
70
D 3.4
D.
43
19 .34 -.12
88
NEXT
Which bull would be considered
a terminal sire?
BW WW MILK REA MARB YW
A 2.4
A.
30
13 .49 -.32
61
B 5.6
B.
48
10 -.01
.15
98
C 0.5
C.
28
21 .11
.62
70
D 3.4
D.
43
19 .34 -.12
88
NEXT
Which bull will have daughters
that will be most improved in
milk production?
BW WW MILK REA MARB YW
A 2.4
A.
30
13 .49 -.32
61
B 5.6
B.
48
10 -.01
.15
98
C 0.5
C.
28
21 .11
.62
70
D 3.4
D.
43
19 .34 -.12
88
NEXT
Which bull will increase muscle
the most in his calf crop?
BW WW MILK REA MARB YW
A.
A 2.4
30
13 .49 -.32
61
B 5.6
B.
48
10 -.01
.15
98
C 0.5
C.
28
21 .11
.62
70
D 3.4
D.
43
19 .34 -.12
88
NEXT
Which bull will make the most
improvement in the offspring’s
ability to grade choice or higher?
BW WW MILK REA MARB YW
A 2.4
A.
30
13 .49 -.32
61
B 5.6
B.
48
10 -.01
.15
98
C 0.5
C.
28
21 .11
.62
70
D 3.4
D.
43
19 .34 -.12
88
NEXT
Which bull will sire the lightest
muscled calves?
BW WW MILK REA MARB YW
A 2.4
A.
30
13 .49 -.32
61
B 5.6
B.
48
10 -.01
.15
98
C 0.5
C.
28
21 .11
.62
70
D 3.4
D.
43
19 .34 -.12
88
NEXT
Which bull will sire the biggest
calves at birth?
BW WW MILK REA MARB YW
A 2.4
A.
30
13 .49 -.32
61
B 5.6
B.
48
10 -.01
.15
98
C 0.5
C.
28
21 .11
.62
70
D 3.4
D.
43
19 .34 -.12
88
NEXT
Which bull will produce the
heaviest feeder calves?
BW WW MILK REA MARB YW
A 2.4
A.
30
13 .49 -.32
61
B 5.6
B.
48
10 -.01
.15
98
C 0.5
C.
28
21 .11
.62
70
D 3.4
D.
43
19 .34 -.12
88
NEXT
EPD’s can be used to compare
different breeds.
A True
A.
B.
B False
NEXT
Which accuracy would make the
EPD’s the most accurate?
A
A.
B.
B
C
C.
D
D.
.28
.54
.90
.67
MENU
An EPD of +.10 weaning weight in the Angus breed
has the same genetic merit as a +.10 for WW in the
Hereford breed
A
B
True
False
Birth Weight (BW) and Weaning
Weight (WW) EPD’s are expressed
in …
A
B
C
D
Degrees
Centimeters
Pounds
Inches
Scrotal Circumferences EPD’s are
expressed in …
A
B
C
D
Degrees
Centimeters
Pounds
Inches
Height EPD’s are expressed in …
A
B
C
D
Degrees
Centimeters
Pounds
Inches
Marbling EPD’s are expressed in …
A
B
C
D
Degrees
Centimeters
Pounds
Inches
EPD Accuracy values range from
A
B
C
D
1-10
1-50
1-100
0-1
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