ANSC 4395-BREEDING & GENETICS FINAL
EXAM QUESTIONS & CORRECT ANSWERS
Actual breeding value of an individual is never known, but can
be estimated from... - correct answer- an individual's
performance and the performance of its relatives
Additive gene action is analogous to... - correct answer- co-
dominance in qualitative traits
-Heterozygote is exactly half way between the homozygotes
An individual's phenotype is the result of its... - correct answer-
genetic merit and the effect of the environment
-Genetic merit can also be called breeding value
As the number of progeny increases, accuracy increases or
decreases? - correct answer- Increases
Between simply-inherited and polygenic traits, which is more
important? - correct answer- Typically, polygenic traits
-Growth rate, fertility, milk production
-Traits that determine productivity and profitability
, Coefficient of Variation: - correct answer- The standard
deviation as a percent of the mean
-Useful for comparing the relative amounts of variation for
various traits
Common Characteristics of Simply-inherited & Polygenic Traits:
- correct answer- -Both are subject to the same Mendelian
mechanisms (Laws of segregation & independent assortment)
-Dominance and epistasis affect both
-Principles of selection and mating apply to both (attempt to
increase the frequencies of favorable alleles)
Continuous Variables: - correct answer- For any two values,
there is a possible intermediate value
EX: WW, YW
Correlation: - correct answer- The measure of the
association between two variables
Different Breeding Approaches-
EXAM QUESTIONS & CORRECT ANSWERS
Actual breeding value of an individual is never known, but can
be estimated from... - correct answer- an individual's
performance and the performance of its relatives
Additive gene action is analogous to... - correct answer- co-
dominance in qualitative traits
-Heterozygote is exactly half way between the homozygotes
An individual's phenotype is the result of its... - correct answer-
genetic merit and the effect of the environment
-Genetic merit can also be called breeding value
As the number of progeny increases, accuracy increases or
decreases? - correct answer- Increases
Between simply-inherited and polygenic traits, which is more
important? - correct answer- Typically, polygenic traits
-Growth rate, fertility, milk production
-Traits that determine productivity and profitability
, Coefficient of Variation: - correct answer- The standard
deviation as a percent of the mean
-Useful for comparing the relative amounts of variation for
various traits
Common Characteristics of Simply-inherited & Polygenic Traits:
- correct answer- -Both are subject to the same Mendelian
mechanisms (Laws of segregation & independent assortment)
-Dominance and epistasis affect both
-Principles of selection and mating apply to both (attempt to
increase the frequencies of favorable alleles)
Continuous Variables: - correct answer- For any two values,
there is a possible intermediate value
EX: WW, YW
Correlation: - correct answer- The measure of the
association between two variables
Different Breeding Approaches-
