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Chapter 3 Quiz
Demo Quiz

There are 25 questions in this quiz.


1 Mutations can result from:
a) certain types of drugs and radiation.
b) mistakes in the replication of DNA.
c) neither a nor b.
d) both a and b.
2 The ultimate source of all new genetic variation is:
a) mutation.
b) genetic drift.
c) speciation.
d) mitosis.
e) all of the above.
3 Evolutionary change can occur:
a) through random genetic drift.
b) when a population is not in Hardy-Weinberg equilibrium.
c) when mutation occurs.
d) a and c.
4 The best definition for biological evolution would be:
a) change in gene frequencies because of mutation.
b) change in gene frequencies because of random drift.
c) change in gene frequencies from one generation to another.
d) none of the above.
5 A state of genetic equilibrium requires:
a) few mutations.
b) random mating.
c) endogamyl.
d) low mortality.
6 The frequency of a dominant allele is 0.6. What is the frequency of its recessive allele?
a) 0.3
b) 1
c) 0.4
d) 0.12
7 New mutations are likely:
a) to produce new species.
b) to be deleterious.
c) to have no effect on a population.
d) none of the above.
8 Migration is:
a) an example of natural selection.
b) evidence for punctuated equilibrium.
c) a move to a new area, spanning a long duration of time.
d) a move to a new area, then rapid return to the original area.
9 Genetic drift causes isolated populations to be:
a) more alike.
b) genetically stable.
c) genetically distinct from each other.
d) in Hardy-Weinberg equilibrium.
10 Mate guarding in soapberry bugs:
a) functions to stop the female from moving.
b) helps stop other males from mating with the female.
c) protects the female from predation.
d) all of the above.
11 All modern breeds of dogs originally come from the wild wolf. This is due to:
a) hidden variation.
b) founder effect.
c) migration.
d) none of the above.
12 A correct assessment of the modern synthesis would be:
a) the integration of Darwinism and genetics.
b) the integration of anthropology with genetics.
c) the integration of Mendel and anthropology.
d) the integration of genetics and field observations.
13 ____________ increases genetic variation.
a) selection.
b) mutation.
c) a and b.
d) neither a nor b.
14 Male soapberry bugs will guard female bugs more when:
a) females are relatively scarce.
b) there are few males.
c) there are more males than females.
d) females are in danger of predation.
15 Behavioral plasticity occurs most often when:
a) environments are very stable.
b) environments are variable.
c) behavior is learned.
d) behavior has recently changed.
16 An exterminator wipes out an entire population of ants. This is an example of:
a) natural selection.
b) the exterminator being selective pressure.
c) both a and b.
d) none of the above.
17 If gene _A_ has a frequency of 0.70 and gene _a_ is at 0.30, what is the frequency of the heterozygote?:
a) .04
b) 1
c) 0.42
d) none of the above
18 In a population in Hardy-Weinberg equilibrium, the allele frequency:
a) changes at a constant rate.
b) changes toward homozygosity.
c) remains constant.
d) changes slowly.
19 Hardy-Weinberg equilibrium requires a set of ideal conditions that include:
a) mutation.
b) genetic drift.
c) nonrandom mating.
d) all of the above.
20 Mutations will happen:
a) because of gene blendings.
b) randomly.
c) to weed out the unfit in a given population.
d) to keep overpopulation from becoming a problem.
21 The is the largest natural reproductive population.
22 _2pq_ in the Hardy-Weinberg equation refers to .
23 Genetic drift is most significant for populations
24 Evolution typically results from a change in frequencies.
25 A population is in Hardy-Weinberg equilibrium when the answer to the formula equals .

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