Podcast
Questions and Answers
What role do genetic variations play in the process of evolution?
What role do genetic variations play in the process of evolution?
- They make evolution possible. (correct)
- They only affect individuals, not populations.
- They hinder evolutionary change.
- They eliminate the need for gene pools.
Which mechanism of microevolution is associated with the introduction of new alleles due to random DNA changes?
Which mechanism of microevolution is associated with the introduction of new alleles due to random DNA changes?
- Natural selection
- Gene flow
- Mutation (correct)
- Genetic drift
How does gene flow contribute to microevolution?
How does gene flow contribute to microevolution?
- It results from random mating within a population.
- It isolates populations, preventing any allele movement.
- It causes mutations that directly change allele frequencies.
- It involves the movement of alleles between different populations. (correct)
What is a consequence of a change in allele frequency in a population's gene pool?
What is a consequence of a change in allele frequency in a population's gene pool?
Which example best illustrates the concept of antibiotic resistance related to evolution?
Which example best illustrates the concept of antibiotic resistance related to evolution?
What is a primary consequence of inbreeding in a population?
What is a primary consequence of inbreeding in a population?
Which of the following best describes the founder effect?
Which of the following best describes the founder effect?
How do preferred phenotypes influence mating behavior in animals?
How do preferred phenotypes influence mating behavior in animals?
What is a consequence of genetic drift in small populations?
What is a consequence of genetic drift in small populations?
What effect does reduced genetic variability from inbreeding have on a population?
What effect does reduced genetic variability from inbreeding have on a population?
How does the visibility of green beetles affect their population in the presence of predators?
How does the visibility of green beetles affect their population in the presence of predators?
What is the primary factor contributing to the increase in the brown beetle population over time?
What is the primary factor contributing to the increase in the brown beetle population over time?
What does the bottleneck effect illustrate concerning population genetics?
What does the bottleneck effect illustrate concerning population genetics?
In the context of natural selection, what can be inferred about the adaptation of the beetles over time?
In the context of natural selection, what can be inferred about the adaptation of the beetles over time?
What likely happens to the green beetle population when predators become more adept at spotting them?
What likely happens to the green beetle population when predators become more adept at spotting them?
Flashcards
Genetic variation
Genetic variation
Differences in genes among individuals in a population, enabling evolution.
Microevolution
Microevolution
Change in the frequency of an allele in a population over time.
Mutation
Mutation
A random change in an allele that can create a new allele in a population.
Gene flow
Gene flow
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Allele frequency
Allele frequency
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Non-random mating
Non-random mating
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Inbreeding
Inbreeding
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Reduced genetic variability
Reduced genetic variability
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Genetic drift
Genetic drift
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Founder effect
Founder effect
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Natural Selection
Natural Selection
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Adaptation
Adaptation
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Bottleneck Effect
Bottleneck Effect
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Gene Frequency
Gene Frequency
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How does a population change during natural selection?
How does a population change during natural selection?
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Study Notes
Factors Causing Evolutionary Change
- Genetic variations are essential for evolution
- Individuals evolve, not populations
- Evolutionary biologists study changes in allele frequencies over time (Hardy-Weinberg equilibrium)
- Gene pool includes all alleles in a population
Microevolution
- Microevolution occurs when allele frequencies change within a population
- Five mechanisms cause these changes:
- Mutation
- Gene flow
- Nonrandom mating
- Genetic drift
- Natural selection
Mutation
- Randomly introduces new alleles into individuals
- If the allele is passed on, allele frequencies in the gene pool change
- Example: antibiotic resistance in bacteria
Gene Flow
- Movement of alleles between different populations
- Results from the migration of individuals
- Brings new alleles into the gene pool
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Description
This quiz covers the key concepts of evolutionary change and microevolution, focusing on genetic variations, mechanisms affecting allele frequencies, and the role of mutation and gene flow. Test your understanding of how these factors contribute to the evolution of populations over time.
