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Science
9th -
10thgrade
Allele Frequency, Hardy-Weinberg, and Genetic Drift
20 questions
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- 1. Multiple Choice
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
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
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
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
Alleles that improve survival will decrease in frequency in the next generation.
True
False
- 6. Multiple Choice
Which is NOT an assumption of Hardy-Weinberg?
natural selection
large populations
no mutations
no migration
random mating
- 7. Multiple Choice
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
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
Which of the following is incorrect?
TT - homozygous dominant
Bb - heterozygous
aa - homozygous recessive
Nn - heterozygous recessive
- 10. Multiple Choice
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
What is the frequency of the dominant allele in this population?
30%
50%
63%
37%
- 12. Multiple Choice
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
An allele combination (BB, Bb, or bb) is called a
phenotype
genotype
mutation
gene flow
- 14. Multiple Choice
The movement of alleles from one population to another is called
genetic drift
the bottleneck effect
the founder effect
gene flow
- 15. Multiple Choice
Small populations are more prone to genetic drift than large populations.
True
False
- 16. Fill in the Blank
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 Choice
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
Dog breeding is an example of
natural selection
genetic drift
speciation
artificial selection
- 19. Multiple Choice
Adaptations are features you are born with that either help you or hurt you in your environment.
True
False
- 20. Multiple Choice
When allele frequencies remain constant, a population is evolving.
True
False
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