Podcast
Questions and Answers
What is gene flow primarily concerned with?
What is gene flow primarily concerned with?
- The increase in population size due to reproduction
- The movement of individuals into new habitats
- The net movement of alleles into or out of a population (correct)
- The creation of new genetic variations through mutations
Which factor is an example of non-random mating?
Which factor is an example of non-random mating?
- The migration of individuals into a new population
- A female selecting a mate based on specific traits (correct)
- Genetic drift causing random changes in allele frequencies
- An equal random pairing of individuals in a population
How does the bottleneck effect impact a population's gene pool?
How does the bottleneck effect impact a population's gene pool?
- It stabilizes allele frequencies over time
- It increases genetic diversity by introducing new alleles
- It causes a drastic reduction in genetic diversity (correct)
- It promotes random mating among individuals
What does microevolution primarily involve?
What does microevolution primarily involve?
In what type of distribution are individuals found in close proximity to each other?
In what type of distribution are individuals found in close proximity to each other?
Which statement best describes population density?
Which statement best describes population density?
What is the primary role of a niche within a habitat?
What is the primary role of a niche within a habitat?
What does a dynamic equilibrium in populations imply?
What does a dynamic equilibrium in populations imply?
What is meant by biotic potential?
What is meant by biotic potential?
Which of the following best defines evolution?
Which of the following best defines evolution?
Flashcards
Mutations
Mutations
Random changes in the genetic material of an organism.
Gene Flow
Gene Flow
The net movement of alleles into or out of a population.
Genetic Drift
Genetic Drift
Change in allele frequencies due to chance events in a small breeding population.
Biotic Potential
Biotic Potential
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Microevolution
Microevolution
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Founder Effect
Founder Effect
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Bottleneck Effect
Bottleneck Effect
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Natural Selection
Natural Selection
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Evolution
Evolution
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Ecosystem
Ecosystem
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Study Notes
Mechanisms of Evolution
- Mutations: Random changes in an organism's genetic material.
- Gene Flow: Net movement of alleles (versions of genes) into or out of a population.
- Non-Random Mating/Sexual Selection: One sex (often female) chooses mates based on traits.
- Genetic Drift: Changes in allele frequencies due to chance events in small populations.
- Founder Effect: New population established by a small group, leading to a different gene pool compared to the original population.
- Bottleneck Effect: Dramatic reduction in population size due to events like habitat loss or disasters, significantly reducing genetic diversity.
- Natural Selection: Individuals with traits better suited to their environment survive and reproduce more successfully, passing those traits to offspring.
- Evolution: Change in population characteristics over time.
- Microevolution: Changes in allele frequencies in a population over time.
Population Characteristics and Dynamics
- Environmental Changes: Can cause selective pressures (factors favouring or disfavouring certain traits)
- Community: All populations of different species in a given area.
- Ecosystem: Includes both biotic (living) and abiotic (non-living) factors.
- Habitat: Physical environment where an organism lives.
- Niche: Roles played by members of a population within a community.
- Population Size: Number of organisms of the same species in a habitat at a given time.
- Population Density: Number of individuals per unit area.
- Dispersion: Arrangement of individuals within a habitat.
- Clumped Distribution: Individuals grouped together.
- Random Distribution: Individuals spaced randomly.
- Uniform Distribution: Individuals spaced evenly apart.
- Dynamic Equilibrium: Populations tend to maintain a steady state, adjusting to environmental changes.
- Biotic Potential: The maximum possible growth rate of a population in ideal conditions.
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Description
Test your understanding of the key mechanisms driving evolution, including mutations, gene flow, and natural selection. This quiz covers concepts such as genetic drift, the founder effect, and bottleneck effect, exploring how these factors shape population characteristics over time.
