MBG 3060 Final questions with complete
solutions A+ rated
What does the Fx value tell us? - correct answer ✔✔If we were to pick a random locus in
individual x's genome, ____ of individual x's genome is homozygous for alleles inherited from
the common ancestors OR x/x loci that are randomly picked will be homozygous as a result of
inheriting an allele in common from the common ancestor(s) OR if we pick a locus at random in
individual x's genome and genotype it there is an ____ chance that the locus will be
homozygous for alleles inherited from common ancestor(s).
How does an increase in inbreeding and relatedness affect the variability we would see due to
over-dominance? - correct answer ✔✔The variability would decrease because the proportion of
heterozygous individuals would decrease and those individuals have the largest expression of
phenotype.
How would an increase in inbreeding and relatedness affect the variability we would see due to
incomplete dominance? - correct answer ✔✔The variability would decrease somewhat because
the proportion of heterozygous individuals would decrease and those individuals have a
phenotype closer to one of the homozygotes.
How would an increase in inbreeding and relatedness affect the variability we would see due to
co-dominance? - correct answer ✔✔The variability would be largely unaffected because the
proportion of heterozygous individuals would decrease and those individuals have a phenotype
between the homozygotes.
How would an increase in inbreeding and relatedness affect the variability we see due to
epistasis? - correct answer ✔✔The variability would increase or decrease somewhat or even
stay the same because the proportion of heterozygous individuals would decrease but the
epistatic interactions could occur amongst any combination of genotypes.
, How would an increase in inbreeding and relatedness affect the variability we see due to
pleiotropy? - correct answer ✔✔The variability would increase or decrease somewhat or even
stay the same because the proportion of heterozygous individuals would decrease but the
pleiotropic interactions could occur amongst any combination of genotypes.
Phenotype of an individual depends upon what? - correct answer ✔✔genotype + environment
Genotype is composed of what? - correct answer ✔✔additive (inheritance) + dominance
(interactions between alleles) + interaction
Environment is composed of what? - correct answer ✔✔permanent and temporary
environment
What components are not passed on to the next generation? - correct answer ✔✔dominance
and interaction genetic effects as well as permanent environment are specific to the animal and
are not passed on
Why do geneticists focus on A? - correct answer ✔✔Focus on A because this is what is passed
from generation to generation
What is the additive genetic component? - correct answer ✔✔A measure of the sum of effects
of individual alleles
What is the dominance genetic component? - correct answer ✔✔A measure of the combined
dominance effects of individual loci
What is the interaction genetic component? - correct answer ✔✔A measure of the combined
interactions between loci (epistasis)
What is degree of dominance? - correct answer ✔✔d/a
solutions A+ rated
What does the Fx value tell us? - correct answer ✔✔If we were to pick a random locus in
individual x's genome, ____ of individual x's genome is homozygous for alleles inherited from
the common ancestors OR x/x loci that are randomly picked will be homozygous as a result of
inheriting an allele in common from the common ancestor(s) OR if we pick a locus at random in
individual x's genome and genotype it there is an ____ chance that the locus will be
homozygous for alleles inherited from common ancestor(s).
How does an increase in inbreeding and relatedness affect the variability we would see due to
over-dominance? - correct answer ✔✔The variability would decrease because the proportion of
heterozygous individuals would decrease and those individuals have the largest expression of
phenotype.
How would an increase in inbreeding and relatedness affect the variability we would see due to
incomplete dominance? - correct answer ✔✔The variability would decrease somewhat because
the proportion of heterozygous individuals would decrease and those individuals have a
phenotype closer to one of the homozygotes.
How would an increase in inbreeding and relatedness affect the variability we would see due to
co-dominance? - correct answer ✔✔The variability would be largely unaffected because the
proportion of heterozygous individuals would decrease and those individuals have a phenotype
between the homozygotes.
How would an increase in inbreeding and relatedness affect the variability we see due to
epistasis? - correct answer ✔✔The variability would increase or decrease somewhat or even
stay the same because the proportion of heterozygous individuals would decrease but the
epistatic interactions could occur amongst any combination of genotypes.
, How would an increase in inbreeding and relatedness affect the variability we see due to
pleiotropy? - correct answer ✔✔The variability would increase or decrease somewhat or even
stay the same because the proportion of heterozygous individuals would decrease but the
pleiotropic interactions could occur amongst any combination of genotypes.
Phenotype of an individual depends upon what? - correct answer ✔✔genotype + environment
Genotype is composed of what? - correct answer ✔✔additive (inheritance) + dominance
(interactions between alleles) + interaction
Environment is composed of what? - correct answer ✔✔permanent and temporary
environment
What components are not passed on to the next generation? - correct answer ✔✔dominance
and interaction genetic effects as well as permanent environment are specific to the animal and
are not passed on
Why do geneticists focus on A? - correct answer ✔✔Focus on A because this is what is passed
from generation to generation
What is the additive genetic component? - correct answer ✔✔A measure of the sum of effects
of individual alleles
What is the dominance genetic component? - correct answer ✔✔A measure of the combined
dominance effects of individual loci
What is the interaction genetic component? - correct answer ✔✔A measure of the combined
interactions between loci (epistasis)
What is degree of dominance? - correct answer ✔✔d/a
