BIO 150 EXAM 1 - UTK 2024
MAMANTOV
ANSWER ALL QUESTIONS IN THIS SECTION
QUESTION 1
Which of the following questions about dung beetles would be studied at the
population level of biological organization?
A: How do dung beetles of different species compete for access to dung food
sources?
B: What gene is responsible for determining the horn phenotype in the dung beetle
species, O. taurus?
C: How does the recycling of dung by beetles impact the carbon cycle on cattle
fields?
D: How does the percentage of horned males vary in O. taurus beetles living in
different geographic areas? - ANSWERS-D
QUESTION 2
When an organism is better able to survive in an environment due to a new
mutation we can conclude:
A: the mutation occurred in response to the environment in order to improve
survivorship
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PAGE 1
, BIO 150 EXAM 1 - UTK 2024
MAMANTOV
B: this could not happen; mutations are always deleterious
C: the mutation occurred at random with respect to the phenotypic change it caused
D: the mutation must have been a chromosomal insertio - ANSWERS-C
QUESTION 3
For biologists studying a large flatworm population in the lab, which of the
following Hardy-Weinberg conditions is most difficult to meet?
A: No genetic drift
B: No gene flow
C: No mutation
D: Random mating - ANSWERS-C
QUESTION 4
When nonrandom mating occurs in a population so that individuals prefer to mate
with similar individuals, allele frequencies should:
A: remain the same, but homozygotes will be overrepresented in the population
B: remain the same, but heterozygotes will be overrepresented in the population.
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PAGE 2
, BIO 150 EXAM 1 - UTK 2024
MAMANTOV
C: change and heterozygotes will be overrepresented in the population
D: change and homozygotes will be overrepresented in the population.
E: remain the same, and genotype frequencies remain at Hardy-Weinberg
equilibrium. - ANSWERS-A
QUESTION 5
The Dunkers are a religious group that moved from Germany to Pennsylvania in
the mid 1700s. They do not marry members outside their own immediate
community. Today, the Dunkers are genetically unique and differ in gene
frequencies, at many loci, from all other populations, including those in their
original homeland. Which of the following likely explains the genetic uniqueness
of this population?
A. Population bottleneck and Hardy-Weinberg equilibrium
B. Gene flow and inbreeding depression
C. Mutation
D. Founder effect, inbreeding, and genetic drift - ANSWERS-D
END OF
PAGE 3
, BIO 150 EXAM 1 - UTK 2024
MAMANTOV
QUESTION 6
Most Swiss starlings produce four to five eggs in each clutch. Starlings producing
fewer or more than this have reduced fitness. Which of the following terms best
describes this situation?
A. Artificial selection
B. Directional selection
C. Stabilizing selection
D. Disruptive selection - ANSWERS-C
QUESTION 7
Currently, the only predators of Galápagos marine iguanas are Galápagos hawks.
Iguana body size is not correlated with risk of hawk predation, although small
iguanas can sprint faster than large iguanas. If predators (e.g., cats) that
preferentially catch and eat slower iguanas are introduced to the island, iguana
body size is likely to ________ in the absence of other factors; the iguanas would
then be under ________ selection.
A. increase; directional
B. increase; disruptive
C. decrease; directional
END OF
PAGE 4
MAMANTOV
ANSWER ALL QUESTIONS IN THIS SECTION
QUESTION 1
Which of the following questions about dung beetles would be studied at the
population level of biological organization?
A: How do dung beetles of different species compete for access to dung food
sources?
B: What gene is responsible for determining the horn phenotype in the dung beetle
species, O. taurus?
C: How does the recycling of dung by beetles impact the carbon cycle on cattle
fields?
D: How does the percentage of horned males vary in O. taurus beetles living in
different geographic areas? - ANSWERS-D
QUESTION 2
When an organism is better able to survive in an environment due to a new
mutation we can conclude:
A: the mutation occurred in response to the environment in order to improve
survivorship
END OF
PAGE 1
, BIO 150 EXAM 1 - UTK 2024
MAMANTOV
B: this could not happen; mutations are always deleterious
C: the mutation occurred at random with respect to the phenotypic change it caused
D: the mutation must have been a chromosomal insertio - ANSWERS-C
QUESTION 3
For biologists studying a large flatworm population in the lab, which of the
following Hardy-Weinberg conditions is most difficult to meet?
A: No genetic drift
B: No gene flow
C: No mutation
D: Random mating - ANSWERS-C
QUESTION 4
When nonrandom mating occurs in a population so that individuals prefer to mate
with similar individuals, allele frequencies should:
A: remain the same, but homozygotes will be overrepresented in the population
B: remain the same, but heterozygotes will be overrepresented in the population.
END OF
PAGE 2
, BIO 150 EXAM 1 - UTK 2024
MAMANTOV
C: change and heterozygotes will be overrepresented in the population
D: change and homozygotes will be overrepresented in the population.
E: remain the same, and genotype frequencies remain at Hardy-Weinberg
equilibrium. - ANSWERS-A
QUESTION 5
The Dunkers are a religious group that moved from Germany to Pennsylvania in
the mid 1700s. They do not marry members outside their own immediate
community. Today, the Dunkers are genetically unique and differ in gene
frequencies, at many loci, from all other populations, including those in their
original homeland. Which of the following likely explains the genetic uniqueness
of this population?
A. Population bottleneck and Hardy-Weinberg equilibrium
B. Gene flow and inbreeding depression
C. Mutation
D. Founder effect, inbreeding, and genetic drift - ANSWERS-D
END OF
PAGE 3
, BIO 150 EXAM 1 - UTK 2024
MAMANTOV
QUESTION 6
Most Swiss starlings produce four to five eggs in each clutch. Starlings producing
fewer or more than this have reduced fitness. Which of the following terms best
describes this situation?
A. Artificial selection
B. Directional selection
C. Stabilizing selection
D. Disruptive selection - ANSWERS-C
QUESTION 7
Currently, the only predators of Galápagos marine iguanas are Galápagos hawks.
Iguana body size is not correlated with risk of hawk predation, although small
iguanas can sprint faster than large iguanas. If predators (e.g., cats) that
preferentially catch and eat slower iguanas are introduced to the island, iguana
body size is likely to ________ in the absence of other factors; the iguanas would
then be under ________ selection.
A. increase; directional
B. increase; disruptive
C. decrease; directional
END OF
PAGE 4
