Name ______________________ Biology 112 – Quiz (Chapter 25)
ALL
QUESTIONS WORTH 1 POINT. CIRCLE THE BEST ANSWER.
1. A
population is _____.
a. any
group of many individuals of the same species
b. a
group of individuals that live in the same area and regularly interbreed
c. a group
of interacting species that live in the same area
d. two or
more groups that regularly interbreed
2. If the
frequency of allele A1 in a population is 0.4 and the
frequency of allele A2 is 0.6 in the same population, what is
the frequency of the homozygotes A1A1 in the next generation?
a. 0.16
b. 1.00
c. 0.36
d. 0.48
3. The
Hardy-Weinberg principle acts as a null model because it describes the
relationship between allele and genotypic frequencies under what circumstances?
a. when
none of the four evolutionary forces is acting, and mating is random
b. when
new species differentiate
c. when
evolution by natural selection increases the fitness of individuals
d. when
individuals in a population are not mating randomly with respect to the HLA genotype
4. Which evolutionary
process is least important
for conservation biologists concerned about the future direction of
evolutionary change in endangered populations?
a.
migration
b. genetic
drift
c. mutation
d. inbreeding
5. Which of the following biological processes leads
to adaptation?
a.
mutation
b. gene
flow
c. genetic
drift
d.
natural selection
6. Which
scenario best illustrates heterozygote advantage?
a. A
population consists of fewer heterozygous individuals than expected under the
Hardy-Weinberg principle.
b.
Individuals heterozygous at a given locus are more fit than homozygous
individuals.
c.
Individuals in a population are nonrandomly mating without inbreeding
depression.
d. Parents
with similar HLA alleles
produce more offspring than parents with dissimilar HLA alleles.
7. Which of
the following is NOT associated with inbreeding?
a.
Allele frequencies change in a population.
b. The
frequency of homozygotes increases in a population.
c.
Individuals in a population experience reduced fitness.
d.
Individual plants self-fertilize.
8. Which populations
would be affected most by random genetic drift?
a. large
populations
b.
small populations
c.
migrating populations
9. Which
population would not be affected by a founder effect?
a. finches
that colonized the Gal‡pagos Islands
b.
Tahitians and English mutineers on the Pitcairn Islands
c.
Ashkenazi Jews that settled in Eastern Europe
d.
survivors of a typhoon in the Pingelap Atoll
10. Genetic
diversity is required for natural selection to act, but natural selection can
reduce or eliminate diversity. What forces restore or maintain diversity of a
population?
a.
Hardy-Weinberg equilibrium
b.
inbreeding
c. genetic
drift
d. gene
flow