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ANSC 4395 Final Exam|78 Complete Accurate Questions with Answers
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ANSC 4395 Final Exam|78 Complete Accurate Questions with Answers
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ANSC 4395 Final Exam|78 CompleteAccurate Questions with Answers
Measured - -Quantitative traits are those that can be __________________.
-Weights
Heights
Litter size
Number of eggs
Racing speed - -Some examples of quantitative traits
-Many pairs of genes - -Quantitative traits are controlled by
-One pair - -Effects of _______ _________ of genes cannot be distinguished.
-Identical - -The activity at any one pair of genes is ______________ to the
types of gene action discussed in simply-inherited traits.
-Phenotype - -The outward appearance of an individual.
-Measurement - -The phenotype for quantitative traits is usually a
_____________________.
-Sum - -The __________ of the genetic and environmental factors which have
an effect.
-P = G + E - -Formula for phenotype
-Subdivided - -Both genetic and environmental factors can be
___________________ into more explicit components.
-Additive effects
Dominance effects
Epistatic effects - -Genetic effects can be divided into
-Additive Effect - -Occur when two or more genes source a single
contribution to the final phenotype.
-Dominance Effect - -Phenomenon of one variant (allele) of a gene on a
chromosome masking or overriding the effect of a different variant of the
same gene on the other copy of the chromosome.
-Epistatic Effect - -The phenomenon where the effects of one gene are
modified by one or several other genes at different loci.
, -Not - -Dominance is ______ always complete.
-Heterozygote - -__________________ is exactly half way between the
homozygotes.
-Selection decisions - -When dominance is present, it affects our ability to
make what?
-Selection - -If a trait is controlled by many pairs of genes with additive
gene action, it will be easier to make improvement through
___________________.
-Epistasis - -Interaction among genes at multiple loci.
-Epistasis - -May have interaction between 2, 3, or more loci.
-Constant - -Gene action at one locus may not be _______________.
-Temporary environmental effects - -These are sources of environmental
variation that have somewhat of a temporary effect.
-Permanent environmental effects - -Change the way an animal performs
for the rest of its life.
-Variance - -_______________ is the square of the standard deviation.
-Best additive genotype
Best dominance genotype
Best epistatic genotype
Best permanent environment genotype
Best temporary environment genotype - -The best animals may have:
-Heritability - -The proportion of the phenotypic variation which is due to
additive gene effects.
-Heritability - -The most important single concept in animal breeding.
-h^2 - -Heritability is symbolized as
-Heritability - -Provides information about differences between individuals
and the nature of the variation within a population.
-From herd to herd
Within a herd if management changes - -Heritability is not constant, is
varies...
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