BIO 320 OLD EXAM QUESTIONS AND
ANSWERS 100% SOLVED.
In the diagram above (from reading of Week 1), the shading of the circles indicates the
phenotype of a trait and each row is a different individual (or the offspring of that
individual). This diagram is demonstrating an older evolutionary theory known as: -
ANSWERTransformational Evolution
Charnov's dimensionless ratio (c) allows for comparing the ___________ for multiple
species regardless of body size and age - ANSWERAge at first reproduction
As relates to physiological ecology and individual tolerances, please match the
terms/concepts to the labeled lines on this graph above:
Range of optimum - ANSWERA
Which of the following observations can you make from the data presented above? -
ANSWERE. All of the above
Which of the following statements are NOT true? - ANSWERin animals with sexual
reproduction, internal copulation is the method by which gametes are brought together
The term monoecy translates to _________ and can be used to describe a plant
___________. - ANSWERone house
that has both sexes on a single individual
Here is another way of visualizing the finch story that we briefly looked at in lecture.
Based on the information given above, which of the following are true statements? -
ANSWERA, B, and C are correct
You set up a dihybrid cross with your animal study. You find that the following
phenotypic ratios result: dominant for both traits (8 out of 16), dominant for trati A /
recessive for trait B (4 out of 16), recessive for trait A / dominant for trait B (2 out of 16),
recessive for both traits (2 out of 16). What is immediately clear from your data? -
ANSWERThese results suggest epistasis
If there is linkage, the expected phenotypic ratio from a dihybrid cross is: - ANSWER3:1
What information can you gather from the histogram shown above? - ANSWERBoth A
and B are correct
Which of the following is NOT a true statement about heritability? - ANSWERtraits with
heritability of 0.9 means that an offspring will show the same trait expression as the
mean of it's parents 90% of the time
, Two populations are connected by gene flow but population A is more likely to receive
genes from population B than the other way around. We could to these populations, A
and B, as: - ANSWERsink....source
At time 0, the heterozygosity (H) for a population (with census 100) is estimated at 0.5,
and the effective population size is 10% of Nc, what would you predict for H of the
population at time 1, assuming that for each generation, H declines by a factor of 1
divided by 2Ne - ANSWER0.45
Under which conditions in nature would you expect to see exponential population
growth? - ANSWERAll of the above are likely
Which of the following is NOT supported by the finch data? - ANSWERthe range of
beak sizes has changed between 1976 and 1978
Look at the graph above displaying data on a population with an N of 1000. Which of
these statements does not fit with what is being shown here? - ANSWERIf females are
more prevalent in the population, there is less genetic drift
146. In a simple top-down trophic system (single producer, single herbivore, and single
consumer), an increase in the population of the consumer is likely to:
A. have no impact on the other trophic levels B. increase the herbivore population
C. increase the plant population
D. decrease the plant population
E. B and D are correct - ANSWERincrease in the plant population
As a force of evolution, genetic drift will be strongest when: - ANSWERpopulations are
small, sex ratio is not equal, and mating is not random
If mortality rate is positively correlated with population density (i.e density dependent),
then survivorship will... - ANSWERalso be density dependent
In a logistic growth curve, what happens to r as N approaches K? - ANSWERr
decreases
If the genotype frequency of the double-spot wing butterflies (dd) in the population is
16%, what is the allele frequency for d? - ANSWER0.4
What would the genotype frequency for the heterozygote (Dd) be for this population? -
ANSWER0.48
The info given above is for the butterfly population in year 0, if you re-examine the
population at year 3 and find that 14% of the population now shows the double-spot
wing morphology, you can confidently conclude... - ANSWERthis population has
evolved
ANSWERS 100% SOLVED.
In the diagram above (from reading of Week 1), the shading of the circles indicates the
phenotype of a trait and each row is a different individual (or the offspring of that
individual). This diagram is demonstrating an older evolutionary theory known as: -
ANSWERTransformational Evolution
Charnov's dimensionless ratio (c) allows for comparing the ___________ for multiple
species regardless of body size and age - ANSWERAge at first reproduction
As relates to physiological ecology and individual tolerances, please match the
terms/concepts to the labeled lines on this graph above:
Range of optimum - ANSWERA
Which of the following observations can you make from the data presented above? -
ANSWERE. All of the above
Which of the following statements are NOT true? - ANSWERin animals with sexual
reproduction, internal copulation is the method by which gametes are brought together
The term monoecy translates to _________ and can be used to describe a plant
___________. - ANSWERone house
that has both sexes on a single individual
Here is another way of visualizing the finch story that we briefly looked at in lecture.
Based on the information given above, which of the following are true statements? -
ANSWERA, B, and C are correct
You set up a dihybrid cross with your animal study. You find that the following
phenotypic ratios result: dominant for both traits (8 out of 16), dominant for trati A /
recessive for trait B (4 out of 16), recessive for trait A / dominant for trait B (2 out of 16),
recessive for both traits (2 out of 16). What is immediately clear from your data? -
ANSWERThese results suggest epistasis
If there is linkage, the expected phenotypic ratio from a dihybrid cross is: - ANSWER3:1
What information can you gather from the histogram shown above? - ANSWERBoth A
and B are correct
Which of the following is NOT a true statement about heritability? - ANSWERtraits with
heritability of 0.9 means that an offspring will show the same trait expression as the
mean of it's parents 90% of the time
, Two populations are connected by gene flow but population A is more likely to receive
genes from population B than the other way around. We could to these populations, A
and B, as: - ANSWERsink....source
At time 0, the heterozygosity (H) for a population (with census 100) is estimated at 0.5,
and the effective population size is 10% of Nc, what would you predict for H of the
population at time 1, assuming that for each generation, H declines by a factor of 1
divided by 2Ne - ANSWER0.45
Under which conditions in nature would you expect to see exponential population
growth? - ANSWERAll of the above are likely
Which of the following is NOT supported by the finch data? - ANSWERthe range of
beak sizes has changed between 1976 and 1978
Look at the graph above displaying data on a population with an N of 1000. Which of
these statements does not fit with what is being shown here? - ANSWERIf females are
more prevalent in the population, there is less genetic drift
146. In a simple top-down trophic system (single producer, single herbivore, and single
consumer), an increase in the population of the consumer is likely to:
A. have no impact on the other trophic levels B. increase the herbivore population
C. increase the plant population
D. decrease the plant population
E. B and D are correct - ANSWERincrease in the plant population
As a force of evolution, genetic drift will be strongest when: - ANSWERpopulations are
small, sex ratio is not equal, and mating is not random
If mortality rate is positively correlated with population density (i.e density dependent),
then survivorship will... - ANSWERalso be density dependent
In a logistic growth curve, what happens to r as N approaches K? - ANSWERr
decreases
If the genotype frequency of the double-spot wing butterflies (dd) in the population is
16%, what is the allele frequency for d? - ANSWER0.4
What would the genotype frequency for the heterozygote (Dd) be for this population? -
ANSWER0.48
The info given above is for the butterfly population in year 0, if you re-examine the
population at year 3 and find that 14% of the population now shows the double-spot
wing morphology, you can confidently conclude... - ANSWERthis population has
evolved
