BIOLOGY 1108 FINAL EXAM WITH LATEST AND
RESEARCHED QUESTIONS AND ANSWERS UPDATED
2024/2025
The term "n" refers to the size of a population, that is, the number of individuals in that
population. In general, in a sample of n individuals, the frequency of an allele is:
A)the number of occurrences of the allele.
B)the number of occurrences of the allele divided by n.
C)the actual value of n
D)the number of occurrences of the allele divided by twice the number of individuals in the
sample (2n).
E)twice the number of occurrences of the allele divided by n. - D)the number of occurrences
of the allele divided by twice the number of individuals in the sample (2n).
If a population is not in Hardy-Weinberg equilibrium, we can conclude that:
A)evolution has occurred.
B)natural selection has occurred.
C)one of the assumptions of the Hardy-Weinberg equilibrium has been violated.
,D)evolution has occurred because one of the assumptions of the Hardy-Weinberg
equilibrium has been violated. - D)evolution has occurred because one of the assumptions
of the Hardy-Weinberg equilibrium has been violated.
The larvae are prey of both parasitoid wasps and birds. Wasps selectively prey on larvae
inside the smallest galls while birds selectively prey on larvae inside the largest galls. The size
of the gall made by the larvae is a heritable trait. Given this information, we can conclude
that the trait 'larval gall size' is subject to:
A)balancing selection.
B)stabilizing selection.
C)directional selection.
D)disruptional selection.
E)heterozygote advantage. - B)stabilizing selection.
You find that a wild population of antelope is not in Hardy-Weinberg Equilibrium. From this
information alone, can you determine the mechanism of evolution operating on the
population?
A)Yes
B)No - B)No
A population with a novel adaptation has evolved that adaptation.
,A)False, but only if the population is under sexual selection
B)True
C)True, but only if the population is under sexual selection
D)False - B)True
The peppered moth provides a well-known example of natural selection. The light-colored
form of the moth was predominant in England before the industrial revolution. In the mid-
nineteenth century, a dark-colored form appeared. The difference is produced by a
dominant allele of one gene. By about 1900, approximately 90% of the moths around
industrial areas were dark colored, whereas light-colored moths were still abundant
elsewhere. Apparently, birds could readily find the light moths against the soot-darkened
background in industrial areas and therefore were eating more light moths. Recently, use of
cleaner fuels has greatly reduced soot in the landscape, and the dark-colored moths have
been disappearing. Should the two forms of moths be considered separate species?
A)Yes, because they have completely different coloration.
B)Yes, because they are reproductively isolated based on habitat.
C)No
D)Yes, because they - C)No
Three populations of crickets look very similar, but the males have courtship songs that
sound different. What function would this difference in song likely serve if the populations
came in contact?
A)a prezygotic isolating mechanism
, B)a postzygotic isolating mechanism
C)a spatial/geographic reproductive isolating mechanism
D)a gametic reproductive isolating mechanism
E)none of the above - A)a prezygotic isolating mechanism
How are two different species most likely to evolve from one ancestral species?
A)phylogenetically, due to heterozygote advantage in hybrids
B)sympatrically, due to extensive inbreeding
C)sympatrically, by a point mutation affecting morphology or behavior
D)allopatrically, due to extensive inbreeding
E)allopatrically, after the ancestral species has split into two populations - E)allopatrically,
after the ancestral species has split into two populations
Which of the following statements is true regarding hybridization?
A)Natural selection sometimes acts against progeny that result from hybridization.
B)Hybridization involves the transfer of genetic material between members of similar
species.
RESEARCHED QUESTIONS AND ANSWERS UPDATED
2024/2025
The term "n" refers to the size of a population, that is, the number of individuals in that
population. In general, in a sample of n individuals, the frequency of an allele is:
A)the number of occurrences of the allele.
B)the number of occurrences of the allele divided by n.
C)the actual value of n
D)the number of occurrences of the allele divided by twice the number of individuals in the
sample (2n).
E)twice the number of occurrences of the allele divided by n. - D)the number of occurrences
of the allele divided by twice the number of individuals in the sample (2n).
If a population is not in Hardy-Weinberg equilibrium, we can conclude that:
A)evolution has occurred.
B)natural selection has occurred.
C)one of the assumptions of the Hardy-Weinberg equilibrium has been violated.
,D)evolution has occurred because one of the assumptions of the Hardy-Weinberg
equilibrium has been violated. - D)evolution has occurred because one of the assumptions
of the Hardy-Weinberg equilibrium has been violated.
The larvae are prey of both parasitoid wasps and birds. Wasps selectively prey on larvae
inside the smallest galls while birds selectively prey on larvae inside the largest galls. The size
of the gall made by the larvae is a heritable trait. Given this information, we can conclude
that the trait 'larval gall size' is subject to:
A)balancing selection.
B)stabilizing selection.
C)directional selection.
D)disruptional selection.
E)heterozygote advantage. - B)stabilizing selection.
You find that a wild population of antelope is not in Hardy-Weinberg Equilibrium. From this
information alone, can you determine the mechanism of evolution operating on the
population?
A)Yes
B)No - B)No
A population with a novel adaptation has evolved that adaptation.
,A)False, but only if the population is under sexual selection
B)True
C)True, but only if the population is under sexual selection
D)False - B)True
The peppered moth provides a well-known example of natural selection. The light-colored
form of the moth was predominant in England before the industrial revolution. In the mid-
nineteenth century, a dark-colored form appeared. The difference is produced by a
dominant allele of one gene. By about 1900, approximately 90% of the moths around
industrial areas were dark colored, whereas light-colored moths were still abundant
elsewhere. Apparently, birds could readily find the light moths against the soot-darkened
background in industrial areas and therefore were eating more light moths. Recently, use of
cleaner fuels has greatly reduced soot in the landscape, and the dark-colored moths have
been disappearing. Should the two forms of moths be considered separate species?
A)Yes, because they have completely different coloration.
B)Yes, because they are reproductively isolated based on habitat.
C)No
D)Yes, because they - C)No
Three populations of crickets look very similar, but the males have courtship songs that
sound different. What function would this difference in song likely serve if the populations
came in contact?
A)a prezygotic isolating mechanism
, B)a postzygotic isolating mechanism
C)a spatial/geographic reproductive isolating mechanism
D)a gametic reproductive isolating mechanism
E)none of the above - A)a prezygotic isolating mechanism
How are two different species most likely to evolve from one ancestral species?
A)phylogenetically, due to heterozygote advantage in hybrids
B)sympatrically, due to extensive inbreeding
C)sympatrically, by a point mutation affecting morphology or behavior
D)allopatrically, due to extensive inbreeding
E)allopatrically, after the ancestral species has split into two populations - E)allopatrically,
after the ancestral species has split into two populations
Which of the following statements is true regarding hybridization?
A)Natural selection sometimes acts against progeny that result from hybridization.
B)Hybridization involves the transfer of genetic material between members of similar
species.
