1. Win, Lose, or Draw Edition
Evolution Review
Win, Lose, or Draw Edition

2. Natural selection operates to produce changes in
individuals.
populations.
kingdoms.
phyla.
animals only.

3. homologous; convergence analogous; convergence homologous; divergence
The wings of a bird and the wings of a butterfly are _______ and show morphological ________.
homologous; convergence
analogous; convergence
homologous; divergence
analogous; divergence
homologous; preservation

4. New alleles arise by mutation. migration. genetic drift.
random mating.
independent assortment.

5. The Hardy-Weinberg formula is valuable for the calculation of changes in
population size.
speciation.
allele frequencies.
mutation.
dimorphism.

6. development of isolating mechanisms
Genetic equilibrium and allele frequencies are maintained by all EXCEPT which one of the following?
development of isolating mechanisms
large population interbreeding freely
differential survival and reproduction
random mating
absence of mutations

7. Which statement is NOT true?
Migration leads to genetic variation.
Dominant genes always occur more frequently in a population than recessive genes.
Nonrandom mating may result in changes in gene frequency.
The Hardy-Weinberg law applies to large, stable populations.
Crossing over increases variation.

8. mutations migration random mating genetic drift natural selection
The genetic equilibrium of a population can be upset by all EXCEPT which of the following?
mutations
migration
random mating
genetic drift
natural selection

9. In the H-W equation, the term q2 refers to the frequency of
a recessive allele of a given locus.
the homozygous recessive genotype at a given locus.
recessive alleles in a population.
heterozygotes in a population.
alleles in the gene pool.

10. In the H-W equation, the term p refers to the frequency of
a recessive allele of a given locus.
the dominant allele of a given locus.
the dominant genotypes in a population.
heterozygotes in a population.
alleles in the gene pool.

11. If the frequency of a recessive gene in a population under genetic equilibrium is 40%, in the next generation the frequency of that gene would be
20%
40%
80%
2pq
unpredictable

12. If the frequency of a recessive allele in a population is 30%, the frequency of the heterozygous carrier is what percent? 42 9 27 60 80

13. Directional selection occurs when
the environment controls which organisms will survive.
humans determine which organisms will survive.
the extremes of the population have a lesser chance to survive.
the extremes of a population have a better chance to survive.
the organisms on one extreme of the population have a better chance to survive than those on the other extreme.

14. Stabilizing selection occurs when
the environment controls which organisms will survive.
humans determine which organisms will survive.
the extremes of the population have a lesser chance to survive.
the extremes of a population have a better chance to survive.
the organisms on one extreme of the population have a better chance to survive than those on the other extreme.

15. Artificial selection occurs when
the environment controls which organisms will survive.
humans determine which organisms will survive.
the extremes of the population have a lesser chance to survive.
the extremes of a population have a better chance to survive.
the organisms on one extreme of the population have a better chance to survive than those on the other extreme.

16. The persistence of the sickle-cell anemia allele in the African population is the result of
a high rate of mutation of the normal allele to the sickle-cell anemia allele.
a decline in the occurrence of malaria in Africa.
nonrandom mating.
the advantage of the heterozygous form over the homozygous forms.
genetic drift.

17. The influence of genetic drift on allele frequencies increases as
population size decreases.
gene flow increases.
mutation rate decreases.
the number of heterozygous loci increases.
random mating increases.

18. temporal isolation mechanical isolation behavioral isolation
Which of the following is a type of postzygotic reproductive isolating mechanism?
temporal isolation
mechanical isolation
behavioral isolation
hybrid sterility
all of these

19. Two individuals are members of the same species if they
possess the same number of chromosomes.
breed at the same time.
are phenotypically indistinguishable.
can mate and produce fertile offspring.
occupy the same habitat.

20. The inability of bees to pollinate the flowers of certain sage plants is an example of
temporal isolation.
hybrid inviability.
mechanical isolation.
gamete mortality.
behavioral isolation.

21. The type of reproductive isolation exhibited by 13-year and 17-year cicadas is
spatial.
behavioral.
mechanical.
ecological.
temporal.

22. Allopatric speciation requires
accelerated gene flow.
physical separation
physical diversity.
behavioral diversity.
all of these.

23. The relationship of the mountain tree shrew and the pitcher plant depicts
temporal isolation.
mechanical isolation.
sympatric speciation.
artificial selection.
coevolution