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Questions and Answers
What is the primary outcome of natural selection within a population?
What is the primary outcome of natural selection within a population?
- Increase in genetic mutation rates
- Enhancement of reproductive success for certain traits (correct)
- Equal distribution of alleles in all individuals
- Random changes in allele frequencies
Which process is primarily responsible for the establishment of a new population by a small group?
Which process is primarily responsible for the establishment of a new population by a small group?
- Bottleneck effect
- Founder effect (correct)
- Gene flow
- Genetic drift
What does gene flow specifically refer to in the context of population genetics?
What does gene flow specifically refer to in the context of population genetics?
- The movement of alleles into or out of a population (correct)
- The random changes in alleles due to chance events
- The selection of mates based on specific traits
- The gradual evolution of a population over time
Microevolution is best described as changes that occur in which of the following?
Microevolution is best described as changes that occur in which of the following?
Which of the following factors can lead to genetic drift in a population?
Which of the following factors can lead to genetic drift in a population?
Flashcards
Population
Population
All members of a species living in the same place at the same time.
Mutation
Mutation
Random changes in an organism's DNA.
Gene Flow
Gene Flow
Movement of genes between populations.
Non-random mating
Non-random mating
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Genetic drift
Genetic drift
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Study Notes
Population Genetics
- A population is all the members of a species in a specific area at a given time.
- Mutations are random changes in an organism's DNA.
- Gene flow is the movement of alleles into or out of a population.
- Non-random mating involves one sex choosing mates based on certain traits.
- Genetic drift is random changes in allele frequencies, significant in small populations.
- Founder effect: a small group establishes a new population, leading to a different allele frequency than the original population.
- Bottleneck effect: a drastic reduction in population size leads to a different allele frequency.
- Natural selection favors traits that improve reproduction.
- Evolution is changes in a population's characteristics over time.
- Microevolution is changes in allele frequencies within a population's gene pool over time.
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