ANSC 2301 Written Lab Exam 1 – LAMB
Questions and Answers
The lamb can be divided into two sections - Correct Answers -Anterior: Foresaddle
Posterior: Hindsaddle
To accurately evaluate the REA and fat thickness of a carcass it must be split between
the ____ and ____ ribs - Correct Answers -12th and 13th
Numerical yield grade serves as the estimate for the % of cuts from a carcass and are
the highest for a YG ____ and the lowest for a YG ____ - Correct Answers -1 (lean) and
5 (fat)
The 4 lean cuts of lamb are - Correct Answers -Leg, loin, rack, and shoulder
The quality grade of lamb carcasses is determined by evaluating which 3 attributes -
Correct Answers -conformation, lean quality, and maturity
Prime and choice grading carcasses must have at least a thin covering of ____ -
Correct Answers -fat (<0.08in)
At what two locations on a lamb carcass would you evaluate flank streaking? - Correct
Answers -primary and secondary
The vast majority, >95%, of LAMB (young) carcasses have a quality grade of USDA
____ or ____ - Correct Answers -prime or choice
List two other factors in addition to the type of joints present on the trotters(wrist/ankle
that are considered by a grader when signing an ovine carcass to a maturity category -
Correct Answers -color and shape of ribs, and lean color
A pair of 12mo market lambs:
1) 165lbs ewe lamb w/ 0.43in fat, a 4.2 REA, conformation score of high Prime, and a
leg score of 15
2) 145lbs lamb w/ 0.23in fat, a 3.9 REA, conformation score of low Prime, and a leg
score of 13
What are the final yield grades of each lamb? - Correct Answers -1) 4.7
2) 2.7
A pair of 12mo market lambs:
, 1) 165lbs ewe lamb w/ 0.43in fat, a 4.2 REA, conformation score of high Prime, and a
leg score of 15
2) 145lbs lamb w/ 0.23in fat, a 3.9 REA, conformation score of low Prime, and a leg
score of 13
Which of the two produce a higher cutability carcass? - Correct Answers -The leaner
one (#2)
A pair of 12mo market lambs:
1) 165lbs ewe lamb w/ 0.43in fat, a 4.2 REA, conformation score of high Prime, and a
leg score of 15
2) 145lbs lamb w/ 0.23in fat, a 3.9 REA, conformation score of low Prime, and a leg
score of 13
Which one has a higher numerical YG? - Correct Answers -The fatter one (#1) with a
4.7
A pair of 12mo market lambs:
1) 165lbs ewe lamb w/ 0.43in fat, a 4.2 REA, conformation score of high Prime, and a
leg score of 15
2) 145lbs lamb w/ 0.23in fat, a 3.9 REA, conformation score of low Prime, and a leg
score of 13
Which would have the higher dressing %? - Correct Answers -The fatter one (#1)
Which of the following have the greatest influence on carcass value?
A) Cutability
B) Carcass Quality Grade
C) Sex Classification
D) Ribeye Area - Correct Answers -A) Cutability (lower Yield Grade)
To be eligible for USDA grading, KPH (kidney, pelvic, and heart fat) must not exceed
____% of the carcass weight - Correct Answers -1%
____ ____ is the term used to describe the amount of live weight thats converted into
carcass weight - Correct Answers -dressing %
An in-tact male lamb with pronounced shoulders and a thick neck. Carcasses w/ these
characteristics are referred to as ____ carcasses - Correct Answers -Bucky
List the 5 quality grades for ovine carcasses - Correct Answers -Prime, Choice, Good,
Utility, Cull
Are either of these lambs considered below average in respect to muscling? - Correct
Answers -No, bc avg muscling is a leg score of 12 w/ a REA of 3.2
Questions and Answers
The lamb can be divided into two sections - Correct Answers -Anterior: Foresaddle
Posterior: Hindsaddle
To accurately evaluate the REA and fat thickness of a carcass it must be split between
the ____ and ____ ribs - Correct Answers -12th and 13th
Numerical yield grade serves as the estimate for the % of cuts from a carcass and are
the highest for a YG ____ and the lowest for a YG ____ - Correct Answers -1 (lean) and
5 (fat)
The 4 lean cuts of lamb are - Correct Answers -Leg, loin, rack, and shoulder
The quality grade of lamb carcasses is determined by evaluating which 3 attributes -
Correct Answers -conformation, lean quality, and maturity
Prime and choice grading carcasses must have at least a thin covering of ____ -
Correct Answers -fat (<0.08in)
At what two locations on a lamb carcass would you evaluate flank streaking? - Correct
Answers -primary and secondary
The vast majority, >95%, of LAMB (young) carcasses have a quality grade of USDA
____ or ____ - Correct Answers -prime or choice
List two other factors in addition to the type of joints present on the trotters(wrist/ankle
that are considered by a grader when signing an ovine carcass to a maturity category -
Correct Answers -color and shape of ribs, and lean color
A pair of 12mo market lambs:
1) 165lbs ewe lamb w/ 0.43in fat, a 4.2 REA, conformation score of high Prime, and a
leg score of 15
2) 145lbs lamb w/ 0.23in fat, a 3.9 REA, conformation score of low Prime, and a leg
score of 13
What are the final yield grades of each lamb? - Correct Answers -1) 4.7
2) 2.7
A pair of 12mo market lambs:
, 1) 165lbs ewe lamb w/ 0.43in fat, a 4.2 REA, conformation score of high Prime, and a
leg score of 15
2) 145lbs lamb w/ 0.23in fat, a 3.9 REA, conformation score of low Prime, and a leg
score of 13
Which of the two produce a higher cutability carcass? - Correct Answers -The leaner
one (#2)
A pair of 12mo market lambs:
1) 165lbs ewe lamb w/ 0.43in fat, a 4.2 REA, conformation score of high Prime, and a
leg score of 15
2) 145lbs lamb w/ 0.23in fat, a 3.9 REA, conformation score of low Prime, and a leg
score of 13
Which one has a higher numerical YG? - Correct Answers -The fatter one (#1) with a
4.7
A pair of 12mo market lambs:
1) 165lbs ewe lamb w/ 0.43in fat, a 4.2 REA, conformation score of high Prime, and a
leg score of 15
2) 145lbs lamb w/ 0.23in fat, a 3.9 REA, conformation score of low Prime, and a leg
score of 13
Which would have the higher dressing %? - Correct Answers -The fatter one (#1)
Which of the following have the greatest influence on carcass value?
A) Cutability
B) Carcass Quality Grade
C) Sex Classification
D) Ribeye Area - Correct Answers -A) Cutability (lower Yield Grade)
To be eligible for USDA grading, KPH (kidney, pelvic, and heart fat) must not exceed
____% of the carcass weight - Correct Answers -1%
____ ____ is the term used to describe the amount of live weight thats converted into
carcass weight - Correct Answers -dressing %
An in-tact male lamb with pronounced shoulders and a thick neck. Carcasses w/ these
characteristics are referred to as ____ carcasses - Correct Answers -Bucky
List the 5 quality grades for ovine carcasses - Correct Answers -Prime, Choice, Good,
Utility, Cull
Are either of these lambs considered below average in respect to muscling? - Correct
Answers -No, bc avg muscling is a leg score of 12 w/ a REA of 3.2
