ANSC 4395 Exam 1 | with COMPLETE SOLUTION | 94 Questions with 100% Correct Answers
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Course
ANSC 4395
Institution
Western Governors University
What is Animal Breeding Correct Answer: Scientific field that uses the principles of genetics to aid in the improvement of livestock.
What are the 3 classes of cattle? Correct Answer: British
American
Exotics- usually European
Who is Robert Bakewell? Correct Answer: "Father of Animal Bre...
ansc 4395 exam 1 | with complete solution | 94 questions with 100 correct answers
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ANSC 4395
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ANSC 4395 Exam 1 | with COMPLETE SOLUTION | 94
Questions with 100% Correct Answers
What is Animal Breeding Correct Answer: Scientific field that uses the principles of genetics to
aid in the improvement of livestock.
What are the 3 classes of cattle? Correct Answer: British
American
Exotics- usually European
Who is Robert Bakewell? Correct Answer: "Father of Animal Breeding"
- Leased out Bulls
What did Robert Bakewell not hesitate to mate? Correct Answer: "best to the best" with little
regard to ancestry. Not afraid to inbreed.
What was one of the first organized breeds of livestock in 1580? Correct Answer: Shorthorns
Who is Gregor Mendel? Correct Answer: He established basic genetic principles that are still
accepted today.
What did Gregor Mendel study? Correct Answer: The genetics of the garden pea.
Population Genetics Correct Answer: Branch of genetics which deals with the factors that affect
the genetic structure of populations.
*what % of alleles and genotypes*
What two guys were involved with population genetics? Correct Answer: 1. Dr. Sewell Wright
2. Sir Ronald Fisher
Dr. Wright did research with who? Correct Answer: USDA and then later at the University of
Chicago
Worked at the Rothamstead Experiment Station in Great Britain. Correct Answer: Dr. Fisher
Dr. Jay Lush Correct Answer: "Father of MODERN animal breeding"
*established a formal theoretical framework to the science of animal breeding*
Dr. Jay Lush established what principles? Correct Answer: The principles of selection, the use
of inbreeding to conserve genes of some individuals, and crossbreeding systems to take
advantage of HYBRID VIGOR.
During the last 30 or 40 years, the use of what has greatly enhanced the potential for genetic
change? Correct Answer: Computers/ technology
, Artificial Insemination and embryo transfer have allowed for what? Correct Answer: Faster
progeny testing and selection has become much more efficient.
What is the primary goal of animal breeders? Correct Answer: Identify animals with desirable
genes and increase the frequency of those genes.
*they want a bunch, they're the ones they select to be parents to pass on the good genes*
What is the best animal? Correct Answer: -Lab- Show winner or best retriever
-Cattle- cutability/% muscle (limousin) or quality grade (angus)
-Dairy Cattle- most milk or best udder, feet and legs.
**all depends on what they want as "best"**
In the 50-60s how were cattle bred? Correct Answer: Short/stubby
How were cattle bred in the 80s? Correct Answer: tall, large
How are cattle bred today? Correct Answer: Moderate (between)
How do you breed an animal so offspring will be the best or better than the parents? Correct
Answer: -Selection-want genetic improvement, identify best animals and breed those.
-Genetic principles
-Animal breeding technologies
Systems Approach Correct Answer: More OBJECTIVE means of determining the best animal.
Systems Approach requires what? Correct Answer: A detailed knowledge of importance and
how performance in these traits interact with such factors as the ENVIORNMENT,
MANAGEMENT POLICIES, COSTS, and REVENUES.
System Correct Answer: a group of interdependent component parts.
*use when selecting best genetics*
Example of systems- Consider the system that is a single ranch: Correct Answer: Components:
animals (genotypes), physical environment, fixed resources, management, and economics.
*Systems Approach*
Animal- Correct 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*
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