Bio 181 Exam 1 Study Guide Review
Questions & Correct Answers Latest Updated
Practice Questions
Which of the following takes a LONG time and results in few phenotypic changes? - ANSWER ✔ - Natural
selection
True or False: Individuals evolve and are the smallest unit of evolution. - ANSWER ✔ - False
Upon what does natural selection act? - ANSWER ✔ - The phenotype
Which of the following is most likely to cause a population to evolve?
a. No natural selection
b. Random mating
c. No mutation
d. Genetic drift - ANSWER ✔ - d. Genetic drift
Which of the following is most likely to cause a population to evolve?
a. Non-random mating
b. No natural selection
c. No mutations
d. No gene flow - ANSWER ✔ - Non-random mating
Genetic drift would probably have its greatest effect on which of the following populations?
a. Small isolated population
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, b. Large population with random mating
c. Small population with a lot of gene flow
d. Large population with nonrandom mating
e. Large population with regular immigration from a neighboring population - ANSWER ✔ - Small
isolated population
Polydactyl (many digits) on some Amish people's hands is an example of _____. - ANSWER ✔ - Founder
effect
The Hardy-Weinberg equation tells us if a population is ..... - ANSWER ✔ - Evolving
Two distinctly different beak sizes occur in a single population of black-bellied seed crackers (a finch
species that lives in Cameroon, West Africa). What type of selection is this? - ANSWER ✔ - Disruptive
_____ selection is when individuals with average phenotypes are favored. - ANSWER ✔ - Stabilizing
Male anole lizards attract females by displaying a red color on their expanded throats. What type of
selection is this? - ANSWER ✔ - Intersexual
Individuals mate with those phenotypically like themselves for selected traits (similar).
a. Random
b. Inbreeding
c. Assortative
d. Disassortative - ANSWER ✔ - c. Assortative
____ mating means that the probability two individuals in a population will mate is not the same for all
possible pairs of individuals.
a. Inbreeding
b. Non-random
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Questions & Correct Answers Latest Updated
Practice Questions
Which of the following takes a LONG time and results in few phenotypic changes? - ANSWER ✔ - Natural
selection
True or False: Individuals evolve and are the smallest unit of evolution. - ANSWER ✔ - False
Upon what does natural selection act? - ANSWER ✔ - The phenotype
Which of the following is most likely to cause a population to evolve?
a. No natural selection
b. Random mating
c. No mutation
d. Genetic drift - ANSWER ✔ - d. Genetic drift
Which of the following is most likely to cause a population to evolve?
a. Non-random mating
b. No natural selection
c. No mutations
d. No gene flow - ANSWER ✔ - Non-random mating
Genetic drift would probably have its greatest effect on which of the following populations?
a. Small isolated population
Page 1 of 12
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, b. Large population with random mating
c. Small population with a lot of gene flow
d. Large population with nonrandom mating
e. Large population with regular immigration from a neighboring population - ANSWER ✔ - Small
isolated population
Polydactyl (many digits) on some Amish people's hands is an example of _____. - ANSWER ✔ - Founder
effect
The Hardy-Weinberg equation tells us if a population is ..... - ANSWER ✔ - Evolving
Two distinctly different beak sizes occur in a single population of black-bellied seed crackers (a finch
species that lives in Cameroon, West Africa). What type of selection is this? - ANSWER ✔ - Disruptive
_____ selection is when individuals with average phenotypes are favored. - ANSWER ✔ - Stabilizing
Male anole lizards attract females by displaying a red color on their expanded throats. What type of
selection is this? - ANSWER ✔ - Intersexual
Individuals mate with those phenotypically like themselves for selected traits (similar).
a. Random
b. Inbreeding
c. Assortative
d. Disassortative - ANSWER ✔ - c. Assortative
____ mating means that the probability two individuals in a population will mate is not the same for all
possible pairs of individuals.
a. Inbreeding
b. Non-random
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