The practice problems do NOT cover all the topics that will
appear in the real exam
Which statement about heritability is INCORRECT?
a) The heritability of a trait may be different for a given population at different times.
b) Zero heritability for a trait in a given population indicates that there is no variation within the
population for that trait.
c) Narrow-sense heritability can be measured by the degree of resemblance between parents and kids.
d) Heritability cannot be higher than 1.
e) Heritability is often 0 for any traits measured in a highly inbred line.
f) Artificial selection of a trait may reduce the heritability of the trait.
2. The Hardy-Weinberg law is NOT applicable if a population
a) is not large.
b) has no mutation.
c) has no migration.
d) has no genetic drift.
e) has no inbreeding.
f) is not subject to selection.
The frequencies of the I
, and I
alleles are 0.5, 0.4, and 0.1, respectively, at the ABO blood
group locus in a Russian population. If the population is under the Hardy-Weinberg equilibrium, the
expected frequencies of the A, B, AB, and O phenotypes are
a) 0.25, 0.16, 0.4, and 0.01
b) 0.25, 0.16, 0.58, and 0.01
c) 0.35, 0.24, 0.4, and 0.01
d) 0.35, 0.24, 0.29, and 0.1
e) 0.5, 0.4, 0, and 0.1
f) 0.25, 0.16, 0.49, and 0.1
4. The human population has a long-term effective size of 10,000, despite the fact that the current
census size is over 6 billion.
This is because human populations went through one or more bottlenecks
in the past.
To understand how bottlenecks affect the effective population size
e, please compute the
effective size of a population over 100 generations, during which the census size was 10 for one
generation, and 1 million for 99 generations.
e is approximately