1
IB 150 Exam 3 study set Questions with
Correct Answers | Updated (100% Correct
Answers)
artificial selection Answer: deliberate manipulation by humans, as in
animal and plant breeding, of the genetic composition of a
population by allowing only individuals with desirable traits
reproduce
natural selection Answer: the process by which individuals with
certain heritable traits tend to produce more surviving offspring
than do individuals without those traits, often leading to a change
in makeup of the population
1) heritable variation leads to 2) differential reproductive success
Answer: evolution by natural selection occurs when...
fitness Answer: the ability of an individual to produce viable
offspring relative to others of the same species
adaptation Answer: any heritable trait that increases the fitness of
an individual with that trait, compared with individuals without that
trait, in a particular environment
natural selection, genetic drift, gene flow, mutation Answer: what
are the four processes that change allele frequencies?
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, 2
hardy-weinberg principle Answer: a principle of population genetics
stating that genotype frequencies in a large population do not
change from generation to generation in the absence of
evolutionary processes (e.g. mutation, gene flow, selection) and non
random mating
gene pool Answer: all of the alleles of all the genes in a certain
population
1) random mating 2) no natural selection 3) no genetic drift
(random allele frequency changes) 4) no gene flow 5) no mutation
Answer: what are the five assumptions of the hardy weinberg
principle?
inbreeding Answer: mating between closely related individuals;
increases homozygosity of a population and often leads to a decline
in the average fitness via selection (inbreeding depression)
inbreeding depression Answer: in inbred offspring, fitness declines
due to deleterious recessive alleles that are homozygous, thus
exposed to selection
no, b/c non random mating only changes genotype frequencies, not
allele frequencies Answer: is non random mating an evolutionary
process?
© 2025 All rights reserved
IB 150 Exam 3 study set Questions with
Correct Answers | Updated (100% Correct
Answers)
artificial selection Answer: deliberate manipulation by humans, as in
animal and plant breeding, of the genetic composition of a
population by allowing only individuals with desirable traits
reproduce
natural selection Answer: the process by which individuals with
certain heritable traits tend to produce more surviving offspring
than do individuals without those traits, often leading to a change
in makeup of the population
1) heritable variation leads to 2) differential reproductive success
Answer: evolution by natural selection occurs when...
fitness Answer: the ability of an individual to produce viable
offspring relative to others of the same species
adaptation Answer: any heritable trait that increases the fitness of
an individual with that trait, compared with individuals without that
trait, in a particular environment
natural selection, genetic drift, gene flow, mutation Answer: what
are the four processes that change allele frequencies?
© 2025 All rights reserved
, 2
hardy-weinberg principle Answer: a principle of population genetics
stating that genotype frequencies in a large population do not
change from generation to generation in the absence of
evolutionary processes (e.g. mutation, gene flow, selection) and non
random mating
gene pool Answer: all of the alleles of all the genes in a certain
population
1) random mating 2) no natural selection 3) no genetic drift
(random allele frequency changes) 4) no gene flow 5) no mutation
Answer: what are the five assumptions of the hardy weinberg
principle?
inbreeding Answer: mating between closely related individuals;
increases homozygosity of a population and often leads to a decline
in the average fitness via selection (inbreeding depression)
inbreeding depression Answer: in inbred offspring, fitness declines
due to deleterious recessive alleles that are homozygous, thus
exposed to selection
no, b/c non random mating only changes genotype frequencies, not
allele frequencies Answer: is non random mating an evolutionary
process?
© 2025 All rights reserved
