Genetic Drift Quiz

What is a primary factor that can lead to genetic drift in small populations?

• Natural Selection

• Random Chance

• Non-Random Mating

Sarah is conducting a study on a small island's rabbit population, which has recently gone through a significant decrease due to a harsh winter. What concept of Genetic Drift might explain the changes in the rabbit population's genetic diversity?

• Bottleneck Effect; Portion of the population separates from the old population to start a new population

• Founders Effect; Population is severely reduced due to natural events

• Bottleneck Effect; A sharp reduction in the size of a population due to environmental events or human activities

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Would antibacterial resistance be a Harmful, Neutral, or Beneficial mutation for a bacteria? (Think about the perspective of the bacteria, not as a human)

• Harmful

• Beneficial

• Neutral

• None of the above

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In the Galápagos Islands, Darwin observed different species of finches with unique characteristics but they are descendants from a common ancestor. What term demonstrates what Darwin observed and how was it caused?

• Biological Resistance

• Genetic Drift

• Speciation

• Mutation

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During his quest to find a mate, Toothless performs a series of intricate dances and displays unique behaviors to attract Luna, a light fury dragon. Which concept does this scenario best illustrate?

• Non-Random Mating

• Adaptation

• Mutation

• Natural Selection

When a polar bear from one region breeds with a polar bear from a distant region, leading to an increase in genetic diversity, what process is being illustrated?

• Genetic Drift; Movement of a small population from their original population

• Mutation; Change in the DNA made them more desirable towards each other

• Gene Flow; Movement of genes from one population to another

• Natural Selection; Survival of the fittest leading to reproduction

True or False: Founders Effect is the movement of genes/members from one population to another

• True

• False

Which is an example of the Founders Effect?

• Snails are hunted until near extinction, population recovers.

• Small group of penguins floats to an island, starts a new population

• Polar Bears are more likely to survive in a snowy environment if they are born white.

• A pack of dogs migrates to a new territory and becomes the dominant predator.

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Following a catastrophic event in the North Sea that drastically reduced the seal population from 8000 to 800, scientists intervened by relocating a small group of these seals to a new habitat. If scientists selected 30 seals from the surviving population for this relocation, how might this action affect the genetic diversity of the relocated seal population in comparison to the original population in the North Sea?

• The new seal population is genetically MORE diverse than the original population

• There is equal genetic variety compared to the original population

• • Genetic diversity in the relocated seal population will be LOWER than that in the original North Sea population/

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Which scenario MOST LIKELY represents genetic drift and why?

• tornado (random event) would lead to a decrease in the number of dark and light beetles

• natural selection led to a decrease in the number of light beetles

• mutation because the light beetles are most fit for the environment