MCB 2410 Exam 2 (Achieve) Study Set
Which statement does not describe a Mendelian population?
a group of interbreeding individuals
a group of individuals of interest to population geneticists
a group of individuals whose set of genes constitute the population's gene pool
a group of sexually reproducing individuals
a population that cannot evolve - ANSWER a population that cannot evolve
Genotype and allele frequencies (select all that apply)
can only be calculated where there are two alleles at a locus.
are used to know how many individuals live in the population.
describe the gene pool of the population.
describe the genetic structure of the population.
are always determined by counting every individual in the population. - ANSWER
describe the gene pool of the population.
describe the genetic structure of the population.
When a population is in Hardy-Weinberg equilibrium, this means
the population might experience migration, drift, mutation or natural selection.
allele frequencies, but not genotype frequencies, can change.
the gene pool will change over time.
the population is large and randomly mating.
individuals do not change over time. - ANSWER the population is large and
randomly mating.
What are the implications for the genetic structure of populations when the
Hardy-Weinberg law is in effect? (Select all that apply)
A single generation of random mating produces the equilibrium frequencies of
p2, 2pq, and q2.
When the two alleles in the population are equal, the frequency of homozygotes
is maximized.
Genotype frequencies are determined by allele frequencies.
Reproduction alone can bring about evolutionary change.
,Allele, but not genotype frequencies, can change over time. - ANSWER A single
generation of random mating produces the equilibrium frequencies of p2, 2pq,
and q2
Genotype frequencies are determined by allele frequencies.
Nonrandom mating
affects allelic frequencies but not genotypic frequencies.
only occurs when relatives mate.
can be measured as the probability that two alleles in an individual are identical
by state.
affects genotypic frequencies but not allelic frequencies.
is always harmful when it occurs in populations. - ANSWER affects genotypic
frequencies but not allelic frequencies.
Inbreeding can have harmful effects in populations because mating between
related individuals (Select all that apply)
causes a reduction in heterozygosity in the population.
results in more frequent cases of inbreeding depression in individuals in the
population.
results more frequently in homozygotes with two alleles that are identical by
state.
increases the chance that deleterious and lethal recessive alleles will combine
to produce homozygotes with harmful traits.
results more frequently in homozygotes with two alleles that are identical by
descent. - ANSWER causes a reduction in heterozygosity in the population.
increases the chance that deleterious and lethal recessive alleles will combine
to produce homozygotes with harmful traits.
results more frequently in homozygotes with two alleles that are identical by
descent.
Which term does not change allele frequencies in a population?
migration
, genetic drift
nonrandom mating
natural selection
mutation - ANSWER nonrandom mating
Which statement best describes the effect of mutation on allele frequencies?
The relative rates of forward and reverse mutation will determine the equilibrium
allele frequency.
Allele frequencies change rapidly when mutation is the driving evolutionary
force.
Recurrent mutation results in eventual fixation of the mutant allele.
Reverse mutation is usually more frequent than forward mutation.
Forward mutation changes allele frequencies but reverse mutation does not. -
ANSWER The relative rates of forward and reverse mutation will determine the
equilibrium allele frequency.
Migration does not result in
populations becoming more genetically similar.
an eventual equilibrium of allele frequencies in all populations involved in
migration.
more genetic variation within populations.
gene flow between populations.
more genetic variation between populations. - ANSWER more genetic variation
between populations.
Which statement is true?
The effective population size is independent of the magnitude and speed of
allele frequency changes occurring in that population.
Genetic drift results in populations that have diverged allele frequencies.
A founder effect occurs when a population undergoes a dramatic reduction in
population size.
Genetic drift results in changes in allele frequencies but not genotype
frequencies.
Which statement does not describe a Mendelian population?
a group of interbreeding individuals
a group of individuals of interest to population geneticists
a group of individuals whose set of genes constitute the population's gene pool
a group of sexually reproducing individuals
a population that cannot evolve - ANSWER a population that cannot evolve
Genotype and allele frequencies (select all that apply)
can only be calculated where there are two alleles at a locus.
are used to know how many individuals live in the population.
describe the gene pool of the population.
describe the genetic structure of the population.
are always determined by counting every individual in the population. - ANSWER
describe the gene pool of the population.
describe the genetic structure of the population.
When a population is in Hardy-Weinberg equilibrium, this means
the population might experience migration, drift, mutation or natural selection.
allele frequencies, but not genotype frequencies, can change.
the gene pool will change over time.
the population is large and randomly mating.
individuals do not change over time. - ANSWER the population is large and
randomly mating.
What are the implications for the genetic structure of populations when the
Hardy-Weinberg law is in effect? (Select all that apply)
A single generation of random mating produces the equilibrium frequencies of
p2, 2pq, and q2.
When the two alleles in the population are equal, the frequency of homozygotes
is maximized.
Genotype frequencies are determined by allele frequencies.
Reproduction alone can bring about evolutionary change.
,Allele, but not genotype frequencies, can change over time. - ANSWER A single
generation of random mating produces the equilibrium frequencies of p2, 2pq,
and q2
Genotype frequencies are determined by allele frequencies.
Nonrandom mating
affects allelic frequencies but not genotypic frequencies.
only occurs when relatives mate.
can be measured as the probability that two alleles in an individual are identical
by state.
affects genotypic frequencies but not allelic frequencies.
is always harmful when it occurs in populations. - ANSWER affects genotypic
frequencies but not allelic frequencies.
Inbreeding can have harmful effects in populations because mating between
related individuals (Select all that apply)
causes a reduction in heterozygosity in the population.
results in more frequent cases of inbreeding depression in individuals in the
population.
results more frequently in homozygotes with two alleles that are identical by
state.
increases the chance that deleterious and lethal recessive alleles will combine
to produce homozygotes with harmful traits.
results more frequently in homozygotes with two alleles that are identical by
descent. - ANSWER causes a reduction in heterozygosity in the population.
increases the chance that deleterious and lethal recessive alleles will combine
to produce homozygotes with harmful traits.
results more frequently in homozygotes with two alleles that are identical by
descent.
Which term does not change allele frequencies in a population?
migration
, genetic drift
nonrandom mating
natural selection
mutation - ANSWER nonrandom mating
Which statement best describes the effect of mutation on allele frequencies?
The relative rates of forward and reverse mutation will determine the equilibrium
allele frequency.
Allele frequencies change rapidly when mutation is the driving evolutionary
force.
Recurrent mutation results in eventual fixation of the mutant allele.
Reverse mutation is usually more frequent than forward mutation.
Forward mutation changes allele frequencies but reverse mutation does not. -
ANSWER The relative rates of forward and reverse mutation will determine the
equilibrium allele frequency.
Migration does not result in
populations becoming more genetically similar.
an eventual equilibrium of allele frequencies in all populations involved in
migration.
more genetic variation within populations.
gene flow between populations.
more genetic variation between populations. - ANSWER more genetic variation
between populations.
Which statement is true?
The effective population size is independent of the magnitude and speed of
allele frequency changes occurring in that population.
Genetic drift results in populations that have diverged allele frequencies.
A founder effect occurs when a population undergoes a dramatic reduction in
population size.
Genetic drift results in changes in allele frequencies but not genotype
frequencies.
