Allele Frequency, Hardy-Weinberg, and Genetic Drift

1.

Multiple Choice

30 sec

1 pt

Someone steps on some bugs and randomly removes their alleles from the population. This is an example of

gene flow

genetic drift

speciation

allele frequency

2.

Multiple Choice

30 sec

1 pt

There are 3 T alleles and 7 t alleles in a population. Calculate the frequency of the recessive allele.

30%

70%

10%

4%

3.

Multiple Choice

30 sec

1 pt

A drastic reduction in the size of a population that can change allele frequencies is called

the bottleneck effect

the founder effect

the gene flow effect

the Thanos effect

4.

Multiple Choice

30 sec

1 pt

Which is not true about cheetah populations?

They have experienced bottlenecks in their evolutionary history.

They have high levels of genetic variation.

They are prone to extinction.

They are not likely to survive environmental changes due to their similarities.

5.

Multiple Choice

30 sec

1 pt

Alleles that improve survival will decrease in frequency in the next generation.

True

False

6.

Multiple Choice

30 sec

1 pt

Which is NOT an assumption of Hardy-Weinberg?

natural selection

large populations

no mutations

no migration

random mating

7.

Multiple Choice

30 sec

1 pt

The Amish have a higher frequency of polydactyly (extra fingers) in their community than the general population. This is due to the allele for extra fingers being present in the group that started the Amish community.

The difference in allele frequency is due to genetic flow.

The difference in allele frequency is due to the founder effect.

The difference in allele frequency is due to a bottleneck.

The difference in allele frequency is due to speciation.

8.

Multiple Choice

30 sec

1 pt

If a population of lizards is isolated on an island, with no new immigrants over many years, any new genetic variations are most likely to come from

recessive alleles

natural selection

mutations

speciation

9.

Multiple Choice

30 sec

1 pt

Which of the following is incorrect?

TT - homozygous dominant

Bb - heterozygous

aa - homozygous recessive

Nn - heterozygous recessive

10.

Multiple Choice

30 sec

1 pt

The allele frequencies of the mouse population in the picture are changing over time. Which is true?

The population is evolving.

The population is not evolving.

The population will go extinct.

The population's genetic variation is increasing.

11.

Multiple Choice

30 sec

1 pt

What is the frequency of the dominant allele in this population?

30%

50%

63%

37%

12.

Multiple Choice

30 sec

1 pt

If all 5 Hardy-Weinberg assumptions are true, a population is said to be in genetic equilibrium. This means

it is evolving

it is not evolving

13.

Multiple Choice

30 sec

1 pt

An allele combination (BB, Bb, or bb) is called a

phenotype

genotype

mutation

gene flow

14.

Multiple Choice

30 sec

1 pt

The movement of alleles from one population to another is called

genetic drift

the bottleneck effect

the founder effect

gene flow

15.

Multiple Choice

30 sec

1 pt

Small populations are more prone to genetic drift than large populations.

True

False

16.

Fill in the Blank

1 min

1 pt

Calculate the frequency of the dominant allele in this population of beetles. Make sure to write your answer in percent form with the percent sign and no numbers after the decimal. (example: 24%)

17.

Multiple Select

45 sec

1 pt

Select ALL of the following that violate the Hardy-Weinberg assumptions and would lead to a change in allele frequencies in a population.

natural selection

large population

no mutations

nonrandom mating

no migration

18.

Multiple Choice

30 sec

1 pt

Dog breeding is an example of

natural selection

genetic drift

speciation

artificial selection

19.

Multiple Choice

30 sec

1 pt

Adaptations are features you are born with that either help you or hurt you in your environment.

True

False

20.

Multiple Choice

30 sec

1 pt

When allele frequencies remain constant, a population is evolving.

True

False

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