KU BIOL 152 EXAM ONE QUESTIONS
AND ANSWERS
What must be present before natural selection can act upon a population? - Correct
Answers -Genetic variation
Most Swiss Starlings produce four to five eggs in each clutch. Starlings producing fewer
or more than this have reduced fitness. This situation can be described by what? -
Correct Answers -Stabilizing selection
Genetic drift, gene flow, mutation, natural selection and non random mating have a
better chance of influencing gene frequencies in a small population. But which one has
the most consistency with needing a small population? - Correct Answers -Genetic drift
p+q= - Correct Answers -1
p²+2pq+q²= - Correct Answers -1
p= - Correct Answers -frequency of "A" alleles
q= - Correct Answers -frequency of "a" alleles
p²= - Correct Answers -frequency of AA genotype
2pq= - Correct Answers -frequency of Aa genotype
q²= - Correct Answers -frequency of aa genotype
What happens when one of the conditions of Hardy Weinberg are not met? - Correct
Answers -evolution
In seed cracker finches from cameroon, small billed and large billed birds specialize in
cracking soft and hard seeds respectively. If long term climactic change resulted in all
seeds becoming hard, what type of selection would then operate in the finch
population? - Correct Answers -Directional selection; when conditions favor individuals
with one extreme of a phenotype (common with environment changes and migration)
Disruptive selection - Correct Answers -when conditions favor an individual with both
extremes of a phenotype over individuals with intermediate phenotypes
, Which is true of natural selection? - Correct Answers -natural selection acts directly on
an individual's phenotype and causes the population to evolve
One species lives in canopy of forest and the other is ground dwelling. - Correct
Answers -habitat isolation
Incompatibilities between the parents genes, the zygotes do not develop properly and
all die in the embryonic stage. - Correct Answers -reduced hybrid viability
Attempt mating, but are unable because of the position of their genitalia. - Correct
Answers -mechanical isolation
Breed during different times of the day, different seasons or different years. - Correct
Answers -temporal isolation
Courtship rituals that attract mates. - Correct Answers -behavior isolation
Sperm of one species may not be able to fertilize the eggs of another species. - Correct
Answers -gametic isolation
Stabilizing selection - Correct Answers -when conditions favor intermediate phenotypes
rather than extremes
Most consistent at causing populations to become better suited to their environment
over the course of generations. - Correct Answers -Natural selection
Diversity is understood to be a result of genetic variation. What is a recognized source
for evolution? - Correct Answers -Recombination by crossing over in mitosis
Biological species concept - Correct Answers -defines a species as a group of
populations that have the ability to interbreed and produce viable offspring
Morphological species concept - Correct Answers -defines a species based on body
shape and structural features
Phylogenetic species concept - Correct Answers -defines a species by the smallest
group of individuals that share a common ancestor
Allopatric speciation - Correct Answers -occurs when gene flow between populations is
interrupted due to a population being divided into geographically isolated sub-
populations
Sympiatric speciation - Correct Answers -occurs in populations that live in the same
geographic location
AND ANSWERS
What must be present before natural selection can act upon a population? - Correct
Answers -Genetic variation
Most Swiss Starlings produce four to five eggs in each clutch. Starlings producing fewer
or more than this have reduced fitness. This situation can be described by what? -
Correct Answers -Stabilizing selection
Genetic drift, gene flow, mutation, natural selection and non random mating have a
better chance of influencing gene frequencies in a small population. But which one has
the most consistency with needing a small population? - Correct Answers -Genetic drift
p+q= - Correct Answers -1
p²+2pq+q²= - Correct Answers -1
p= - Correct Answers -frequency of "A" alleles
q= - Correct Answers -frequency of "a" alleles
p²= - Correct Answers -frequency of AA genotype
2pq= - Correct Answers -frequency of Aa genotype
q²= - Correct Answers -frequency of aa genotype
What happens when one of the conditions of Hardy Weinberg are not met? - Correct
Answers -evolution
In seed cracker finches from cameroon, small billed and large billed birds specialize in
cracking soft and hard seeds respectively. If long term climactic change resulted in all
seeds becoming hard, what type of selection would then operate in the finch
population? - Correct Answers -Directional selection; when conditions favor individuals
with one extreme of a phenotype (common with environment changes and migration)
Disruptive selection - Correct Answers -when conditions favor an individual with both
extremes of a phenotype over individuals with intermediate phenotypes
, Which is true of natural selection? - Correct Answers -natural selection acts directly on
an individual's phenotype and causes the population to evolve
One species lives in canopy of forest and the other is ground dwelling. - Correct
Answers -habitat isolation
Incompatibilities between the parents genes, the zygotes do not develop properly and
all die in the embryonic stage. - Correct Answers -reduced hybrid viability
Attempt mating, but are unable because of the position of their genitalia. - Correct
Answers -mechanical isolation
Breed during different times of the day, different seasons or different years. - Correct
Answers -temporal isolation
Courtship rituals that attract mates. - Correct Answers -behavior isolation
Sperm of one species may not be able to fertilize the eggs of another species. - Correct
Answers -gametic isolation
Stabilizing selection - Correct Answers -when conditions favor intermediate phenotypes
rather than extremes
Most consistent at causing populations to become better suited to their environment
over the course of generations. - Correct Answers -Natural selection
Diversity is understood to be a result of genetic variation. What is a recognized source
for evolution? - Correct Answers -Recombination by crossing over in mitosis
Biological species concept - Correct Answers -defines a species as a group of
populations that have the ability to interbreed and produce viable offspring
Morphological species concept - Correct Answers -defines a species based on body
shape and structural features
Phylogenetic species concept - Correct Answers -defines a species by the smallest
group of individuals that share a common ancestor
Allopatric speciation - Correct Answers -occurs when gene flow between populations is
interrupted due to a population being divided into geographically isolated sub-
populations
Sympiatric speciation - Correct Answers -occurs in populations that live in the same
geographic location
