Explore Genetic Drift and Its Effects-March madness week 4

Which of the following is an example of the bottleneck effect?

• Cheetah populations reach their lowest levels with reduced diversity and as they rebound are so genetically similar they appear to be inbred.

• Affected individuals with blue skin can trace their ancestry back to one of the first settlers in the region.

• The environment of a fox population changes and over time foxes who are white survive and pass on their genes to their offspring.

• Humans choose two dogs they like the characteristics of and breed them together.

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The bottleneck effect ​___________ biodiversity in a population.

• decreases

• increases

• does not effect

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Which of the following is an example of the founder effect?

• Humans choose two dogs they like the characteristics of and breed them together.

• Affected individuals with blue skin can trace their ancestry back to one of the first settlers in the region.

• The environment of a fox population changes and over time foxes who are white survive and pass on their genes to their offspring.

• Cheetah populations reach their lowest levels with reduced diversity and as they rebound are so genetically similar they appear to be inbred.

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What is the best way to describe what is happening in this diagram?

• the surviving population has a smaller gene pool and therefore has less genetic diversity

• the surviving population has a larger gene pool and therefore has less genetic diversity

• the surviving population has a smaller gene pool and therefore has more genetic diversity

• the surviving population has a larger gene pool and therefore has more genetic diversity

Genetic drift is change in the allele frequency of a population due to...

• random chance

• natural selection

• non-random mating (sexual selection)

• artificial selection

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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

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How do populations change due to genetic drift?

• A random event occurs that reduces the population, and the new surviving population has a different allele frequency from the original population.

• The population undergoes competition with each other for limited resources changing allele frequency from the original population.

• The organism/animal with the most favorable trait will be able to produce more offspring than others creating the new population.

• organisms within a population undergo symbiotic relationships with each other due to mutations

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In which of the following populations would genetic drift be most likely to cause a rapid evolution of the population?

• The human population of India

• A large population of Mexican free-tailed bats living in central Texas

• A geographically isolated population of 5000 green tree frogs

• A small group of 12 cheetahs living in Namibia

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A forest fire randomly destroys most of the birch trees, leaving only a few scattered survivors. Over time, the gene pool of the remaining population changes. What evolutionary processes does this describe? (select all that apply)

• genetic drift

• gene flow

• bottleneck effect

• mutation

When allelic frequencies are changed by random chance

• Population evolution

• Genetic drift

• Temporal Isolation

• Relative frequency