Pm3110 Quiz 4
___ 24. In which population is the frequency of the allele for brown feathers highest?
a.
A
b.
B
c.
C
d.
D
e.
E
____ 25. In which population would it be least likely that an accident would significantly alter the frequency of the brown allele?
a.
A
b.
B
c.
C
d.
D
e.
E
____ 26. The probability of a mutation at a particular gene locus is ____, and the probability of a mutation in the genome of a particular individual is ____.
a.
high; low
b.
low; high
c.
low; low
d.
high; high
e.
moderate; moderate
____ 27. Which factor is the most important in producing the variability that occurs in each generation of humans?
a.
mutation
b.
sexual recombination
c.
genetic drift
d.
nonrandom mating
e.
natural …show more content…
In a large, sexually reproducing population, the frequency of an allele changes from 0.6 to 0.2. From this change, one can most logically assume that, in this environment,
a.
the allele is neutral.
b.
the allele mutates readily.
c.
random processes have changed allelic frequencies.
d.
there is no sexual selection.
e.
the allele reduces fitness.
____ 29. You are maintaining a small population of fruit flies in the laboratory by transferring the flies to a new culture bottle after each generation. After several generations, you notice that the viability of the flies has decreased greatly. Recognizing that small population size is likely to be linked to decreased viability, the best way to reverse this trend is to
a.
cross your flies with flies from another lab.
b.
reduce the number of flies that you transfer at each generation.
c.
transfer only the largest flies.
d.
change the temperature at which you rear the flies.
e.
shock the flies with a brief treatment of heat or cold to make them more hardy.
____ 30. If the frequency of a particular allele that is present in a small, isolated population of alpine plants should change due to a landslide that leaves an even smaller remnant of surviving plants, then what has
a.
A
b.
B
c.
C
d.
D
e.
E
____ 25. In which population would it be least likely that an accident would significantly alter the frequency of the brown allele?
a.
A
b.
B
c.
C
d.
D
e.
E
____ 26. The probability of a mutation at a particular gene locus is ____, and the probability of a mutation in the genome of a particular individual is ____.
a.
high; low
b.
low; high
c.
low; low
d.
high; high
e.
moderate; moderate
____ 27. Which factor is the most important in producing the variability that occurs in each generation of humans?
a.
mutation
b.
sexual recombination
c.
genetic drift
d.
nonrandom mating
e.
natural …show more content…
In a large, sexually reproducing population, the frequency of an allele changes from 0.6 to 0.2. From this change, one can most logically assume that, in this environment,
a.
the allele is neutral.
b.
the allele mutates readily.
c.
random processes have changed allelic frequencies.
d.
there is no sexual selection.
e.
the allele reduces fitness.
____ 29. You are maintaining a small population of fruit flies in the laboratory by transferring the flies to a new culture bottle after each generation. After several generations, you notice that the viability of the flies has decreased greatly. Recognizing that small population size is likely to be linked to decreased viability, the best way to reverse this trend is to
a.
cross your flies with flies from another lab.
b.
reduce the number of flies that you transfer at each generation.
c.
transfer only the largest flies.
d.
change the temperature at which you rear the flies.
e.
shock the flies with a brief treatment of heat or cold to make them more hardy.
____ 30. If the frequency of a particular allele that is present in a small, isolated population of alpine plants should change due to a landslide that leaves an even smaller remnant of surviving plants, then what has