How can we help?

You can also find more resources in our Help Center.

13 terms

multiple choice questions chapter 16

STUDY
PLAY
for most genes, a gene pool typically contains
a. none
b. one
c. two or more.
d. no more than two
two or more alleles
what type of natural selection takes place when individuals at the upper and lower ends of the curve have higher fitness than individuals near the middle?
a. directional
b. stabilizing
c. destabilizing
d. disruptive
disruptive selection
a random change in allele frequency is called
a. fitness
b. genetic drift
c. speciation
d. founder effect
b. genetic drift
genetic drift is more likely to occur in
a. large populations
b. medium-sized populations
c. small populations
d. single individual
c. small populations
what occurs when allele frequencies change as a result of the migration of small subgroup of population?
a. directional selection
b. the founder effect
c. speciation
d. genetic equilibrium
b. the founder effect
what principle states that the frequency of an allele in a population will remain constant unless one or more factors cause that frequency to change
a.speciation principle
b. genetic equilibrium principle
c. the hardy-weinberg principle
d. the genetic-drift principle
c. hardy-weinberg principle
the situation in which allele frequencies do not change is called
a. genetic equilibrium
b. stabilizing equilibrium
c.behavioral equilibrium
d. directional selection
a. genetic equilibrium
which of the following is required to maintain genetic equilibrium?
a. the population must be small
b. no mutations occur
c. individuals move between populations
d. natural selection occurs
b. no mutations occur
what situation occurs when members of two different species cannot interbreed and produce fertile offspring?
a. reproductive isolation
b. genetic equilibrium
c. genetic drift
d. natural selection
a. reproductive isolation
what is the formation of a new species called?
a. directional selection
b. speciation
c. founder effect
d. temporal isolation
b. speciation
what kind of isolation occurs when two populations are capable of interbreeding but have difference in courtship rituals or other types of behavior?
a. courtship isolation
b. behavioral isolation
c. geographic isolation
d. temporal isolation
c. geographic isolation
two populations kept separate by a river are characterized by
a. genetic drift
b. behavioral isolation
c. geographic isolation
d. temporal isolation
c. geographic isolation
what situation occurs when two or more species reproduce at different times?
a. stabilizing selection
b. behavioral isolation
c. geographic isolation
d. temporal isolation
d. temporal isolation