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ANSC 4395 Exam 1 Rated A+ 2024
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ANSC 4395 Exam 1 Rated A+ 2024
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ANSC 4395 Exam 1 Rated A+ 2024*Systems Approach*
Animal- - ANSWER-Characteristic genotype(s), may be more than one.
- Small size, low feed intake, low production, high milkfat. (not much to maintain)-*low
lbs --> high dairy*
- Large size, large intake, high production, low milkfat. (more to maintain)-*high lbs -->
low dairy*
*Systems Approach*
Economics- - ANSWER-Costs of farm inputs like feed, labor, and supplies and the
prices of farm outputs (revenue), long and short term interest rates.
*Systems Approach*
Fixed Resources- - ANSWER-the size of the farm, ability of the farm to grow
supplementary feeds, and available labor.
*Systems Approach*
Management- - ANSWER-all policies implemented by the farmer-(feeding, healthcare,
length of time an animal is on the farm)
**FEED IS PRIMARY EXPENSE**
*Systems Approach*
Physical Environment examples- - ANSWER-- Weather, altitude, soil, quality and
quantity of forages.
*Systems Approach*
Physical Environment- - ANSWER-Elements of the environment over which human
exert little or no control.
Accuracy - ANSWER-a measure of the strength of the relationship between true values
and their predictions
Artificial Insemination and embryo transfer have allowed for what? - ANSWER-Faster
progeny testing and selection has become much more efficient.
Artificial Selection - ANSWER-selection that is under human control
Artificial selection has two components: - ANSWER-replacement selection and culling
best sets of genes = - ANSWER-best breeding value
Between Breed Selection - ANSWER-the process that determines the breed(s) from
which parents are selected
, Biological Type - ANSWER-a classification for animals with similar genotypes for traits
of interest
Breeding objective - ANSWER-a general goal for a breeding program; notion of what
contributes the best animal
Breeding value - ANSWER-the value of an individual as a parent, the genetic merit of
an individual.
Collateral Relatives - ANSWER-relatives that are neither direct ancestors nor direct
descendants of an individual
ex. Aunts, uncles, nieces, nephews
Complementarity - ANSWER-an improvement in the overall performance of offspring
resulting from mating individuals with different but complementary breeding values
Corrective mating - ANSWER-a mating designed to correct in their progeny faults of one
or both parents
Crossbred - ANSWER-Having parents of different breeds or breed combinations
Crossbreeding - ANSWER-the mating of sires of one breed or breed combination to
dams of another breed or breed combination.
Culling - ANSWER-The process that determines which parents will no longer remain
parents.
*WILL NOT REPRODUCE*
Dam - ANSWER-female parent
Dr. Jay Lush - ANSWER-"Father of MODERN animal breeding"
*established a formal theoretical framework to the science of animal breeding*
Dr. Jay Lush established what principles? - ANSWER-The principles of selection, the
use of inbreeding to conserve genes of some individuals, and crossbreeding systems to
take advantage of HYBRID VIGOR.
Dr. Wright did research with who? - ANSWER-USDA and then later at the University of
Chicago
During the last 30 or 40 years, the use of what has greatly enhanced the potential for
genetic change? - ANSWER-Computers/ technology
Elite breeders - ANSWER-produce the best; purebred
End users - ANSWER-commercial production; crossbred animals occur
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