chapter 25

19 terms by gazar1990

Create a new folder

Like this study set?

Create a free Quizlet account to save it and study later.

Sign up for an account

Already have a Quizlet account? .

Create an account

Advertisement Upgrade to remove ads

population genetics

True or False:
All genetic drift arises from sampling errors and chance


True or false:
A population may be in Hardy-Weinberg equilibrium for one locus but not for others.


True or false:
If an allele is "fixed" in a population, it has a frequency of 1.0.


True or false:
Inbreeding results in an increase in the frequency of heterozygotes compared to the results of random mating.


True or false:
Genetic variation must exist within a population before evolution can take place.


True or false:
Allelic frequencies within populations are affected by dominance and recessiveness.


True or false:
Natural selection is defined as the differential reproduction of genotypes.


True or false:
Overdominance refers to the lack of expression of recessive phenotypes.


True or false:
Genetic bottlenecks are a type of founder effect.


True or false:
Genetic differences in large, randomly breeding populations remain constant if migration occurs.


Which of the following is NOT an example of nonrandom mating?
a. positive assortative mating
b. inbreeding
c. outbreeding
d. panmixis
e. negative assortative mating

d. panmixis

The probability that two alleles are identical by descent is the _____

a. coalescent
b. inbreeding coefficient
c. panmictic constant
d. outcrossing rate
e. relatedness

b. inbreeding coefficient

Rapid changes in allelic frequencies by __ take place in populations that are __ .
a. mutation
b. evolving
c. inbred
d. small
e. genetic drift

e. genetic drift
d. small

Migration tends to _ genetic variation between subpopulations and _ genetic variation within each subpopulation.
a. increase
b. not change
c. reduce
d. standardize
e. invert

c. reduce
a. increase

A Mendelian population is defined by individuals
a. interbreeding.
b. inbreeding.
c. evolving.
d. living in close proximity.
e. migrating.

a. interbreeding

Which of the following evolutionary forces does NOT change allele frequencies?
a. nonrandom mating
b. mutation
c. selection
d. drift
e. migration

a. nonrandom mating

. Any change in a population from Hardy-Weinberg equilibrium can be defined as ______.
a. mutation
b. genetic equilibrium
c. migration
d. evolution
e. natural selection

d. evolution


27. evolution
28. inbreeding coefficient
29. genetic drift
30. gene pool
31. migration
32. mutation
33. negative directional selection

a. All genetic information within a Mendelian population
b. The mean trait value decreases from one generation to another
c. Any change in allele frequencies within a population
d. Probability of alleles being identical by descent
e. Alleles may disappear from the population simply by chance
f. Movement of genes
g. Generation of new alleles

c, d, e, a, f, g, b


34. population bottleneck
35. gene flow between two island populations
36. mutation
37. genetic drift
38. negative directional selection

a. Allele frequencies become more similar across populations
b. Generation of new alleles changes allele frequencies very slowly
c. Alleles may disappear from the population simply by chance
d. Allele frequencies do not change
e. The mean trait value decreases from one generation to another

c, a, b, c, e

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set