1|Page
COW CALF FINAL EXAM 2025| BRAND NEW ACTUAL
EXAM WITH 100% VERIFIED QUESTIONS AND
CORRECT SOLUTIONS| GUARANTEED VALUE PACK|
ACE YOUR GRADES.
What are the objectives in selecting replacement heifers? - (answer)In heifer
selection, you want to identify heifers that will conceive early in the breeding
season (meaning they should reach puberty earlier), calve easily, give a flow of
milk consistent with the environment, wean an acceptable calf, and make positive
contribution to the calves postweaning growth and carcass traits.
We can tell by looking at a heifer if she will be fertile - T/F - (answer)False
How do I calculate adjusted 205 day weight? - (answer)(WW-BW/Age) x
(205d+BW+AoD Adj.)
Should I use adjusted 205 day weight to select replacement heifers? Why? -
(answer)No, favors younger heifers that reach puberty later
What is the simple way to select my heifers if I don't have a set of scales? -
(answer)Choose the oldest, visibly larger heifers
In the lab exercise on selecting replacement heifers, why did we cull the Angus
and Brahman heifers out first? - (answer)
,2|Page
What two factors are most important in selecting heifers? - (answer)Age and
weight
Heifers should reach puberty 1-3 months before being bred - T/F - (answer)True.
The first pubertal estrus is less fertile, so having at least one cycle before the
breeding season is ideal (although 2 cycles is ideal).
It is not really important when a heifer conceives in the breeding season as long
as she does - T/F - (answer)False, heifers that become pregnant early in the
breeding season have a higher lifetime production potential
What are major factors affecting puberty? (list the top 4) - (answer)Breed, age,
weight, and BCS are the top 4 factors affecting puberty in beef heifers.
How does breed impact puberty? - (answer)In general, dairy breeds are the
youngest at puberty, bos indicus are the oldest at puberty, heavy milking beef
breeds are younger at puberty. There are large variations within and between
breeds.
Can we modify age at puberty by crossbreeding? - (answer)Yes, crossbred cows
usually reach puberty earlier than their straightbred counterparts due to hybrid
vigor effects. The way to do this is crossbreeding with another breed that has a
similar or younger age at puberty.
Timing of gain in heifers is not as critical as making sure that heifers reach their
target weight - T/F - (answer)True. There is currently no statistical difference in
, 3|Page
the timing of gain in heifers, meaning they could gain consistently, gain slowly and
then rapidly, or rapidly and then slowly, and still reach the correct weight at
puberty (all timing produces the same final weight, age at first estrus, and
pregnancy rate)
What is the target weight for heifers at breeding? Is this the average weight? -
(answer)The target weight for heifers at breeding should be 65% of their mature
weight.
Why should heifers be sorted into management groups (if you have a large
number of heifers)? - (answer)There are social effects between heavier and
lighter heifers, such as dominance/competition for food. Heifers should be sorted
into heavy and light groups if you have a large number of heifers to reduce
competition, balance their ADG, increase weight, and overall decrease age at
puberty and increase pregnancy rate. (Pregnancy rates will increase by about 20%
in lighter heifers that are sorted into a different management group)
Calculate the target weight for a set of heifers. - (answer)Example: 1100 lb
mature wt x 65% = 715 lbs at the start of breeding. All heifers in the set should
weigh at least the 715 lbs
Should I implant my heifers? Why? Should you implant all heifers or replacement
heifers? When should you implant them? - (answer)If replacement heifers are
identified at an early age, don't implant
If replacements are not identified at an early age, implant all between 2 months
and weaning
-Heifers not kept as replacements will be heavier
COW CALF FINAL EXAM 2025| BRAND NEW ACTUAL
EXAM WITH 100% VERIFIED QUESTIONS AND
CORRECT SOLUTIONS| GUARANTEED VALUE PACK|
ACE YOUR GRADES.
What are the objectives in selecting replacement heifers? - (answer)In heifer
selection, you want to identify heifers that will conceive early in the breeding
season (meaning they should reach puberty earlier), calve easily, give a flow of
milk consistent with the environment, wean an acceptable calf, and make positive
contribution to the calves postweaning growth and carcass traits.
We can tell by looking at a heifer if she will be fertile - T/F - (answer)False
How do I calculate adjusted 205 day weight? - (answer)(WW-BW/Age) x
(205d+BW+AoD Adj.)
Should I use adjusted 205 day weight to select replacement heifers? Why? -
(answer)No, favors younger heifers that reach puberty later
What is the simple way to select my heifers if I don't have a set of scales? -
(answer)Choose the oldest, visibly larger heifers
In the lab exercise on selecting replacement heifers, why did we cull the Angus
and Brahman heifers out first? - (answer)
,2|Page
What two factors are most important in selecting heifers? - (answer)Age and
weight
Heifers should reach puberty 1-3 months before being bred - T/F - (answer)True.
The first pubertal estrus is less fertile, so having at least one cycle before the
breeding season is ideal (although 2 cycles is ideal).
It is not really important when a heifer conceives in the breeding season as long
as she does - T/F - (answer)False, heifers that become pregnant early in the
breeding season have a higher lifetime production potential
What are major factors affecting puberty? (list the top 4) - (answer)Breed, age,
weight, and BCS are the top 4 factors affecting puberty in beef heifers.
How does breed impact puberty? - (answer)In general, dairy breeds are the
youngest at puberty, bos indicus are the oldest at puberty, heavy milking beef
breeds are younger at puberty. There are large variations within and between
breeds.
Can we modify age at puberty by crossbreeding? - (answer)Yes, crossbred cows
usually reach puberty earlier than their straightbred counterparts due to hybrid
vigor effects. The way to do this is crossbreeding with another breed that has a
similar or younger age at puberty.
Timing of gain in heifers is not as critical as making sure that heifers reach their
target weight - T/F - (answer)True. There is currently no statistical difference in
, 3|Page
the timing of gain in heifers, meaning they could gain consistently, gain slowly and
then rapidly, or rapidly and then slowly, and still reach the correct weight at
puberty (all timing produces the same final weight, age at first estrus, and
pregnancy rate)
What is the target weight for heifers at breeding? Is this the average weight? -
(answer)The target weight for heifers at breeding should be 65% of their mature
weight.
Why should heifers be sorted into management groups (if you have a large
number of heifers)? - (answer)There are social effects between heavier and
lighter heifers, such as dominance/competition for food. Heifers should be sorted
into heavy and light groups if you have a large number of heifers to reduce
competition, balance their ADG, increase weight, and overall decrease age at
puberty and increase pregnancy rate. (Pregnancy rates will increase by about 20%
in lighter heifers that are sorted into a different management group)
Calculate the target weight for a set of heifers. - (answer)Example: 1100 lb
mature wt x 65% = 715 lbs at the start of breeding. All heifers in the set should
weigh at least the 715 lbs
Should I implant my heifers? Why? Should you implant all heifers or replacement
heifers? When should you implant them? - (answer)If replacement heifers are
identified at an early age, don't implant
If replacements are not identified at an early age, implant all between 2 months
and weaning
-Heifers not kept as replacements will be heavier
