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Questions and Answers
Which of the following is true about intrasexual selection?
Which of the following is true about intrasexual selection?
- It is competition among females for access to males. (correct)
- It occurs when males display traits to attract females.
- It is when certain traits increase reproductive success.
- It affects small populations more than larger ones.
Which type of selection favors extreme phenotypes over intermediate ones?
Which type of selection favors extreme phenotypes over intermediate ones?
- Random selection
- Stabilizing selection
- Directional selection
- Disruptive selection (correct)
What is the proportion of one allele in the gene pool called?
What is the proportion of one allele in the gene pool called?
- Phenotypic frequency
- Allele frequency (correct)
- Gene frequency
- Trait frequency
Which phenomenon is responsible for the observable change in the allele frequencies of a population over time?
Which phenomenon is responsible for the observable change in the allele frequencies of a population over time?
What factors can disrupt the equilibrium of a population according to the Hardy-Weinberg equation?
What factors can disrupt the equilibrium of a population according to the Hardy-Weinberg equation?
Which of the following is an example of sexual selection?
Which of the following is an example of sexual selection?
What kind of distribution curve does the beak length of penguins follow?
What kind of distribution curve does the beak length of penguins follow?
What is speciation?
What is speciation?
What is the main factor that drives natural selection?
What is the main factor that drives natural selection?
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Study Notes
- Phenotypic differences are due to genes that code for traits.
- Natural selection favors advantageous traits within a population.
- Mutations and crossing over/recombination can result in genetic variation.
- Allele frequency is the proportion of one allele in the gene pool.
- The Hardy-Weinberg equation is used to determine equilibrium in populations.
- The equilibrium is disrupted by mutations, small population size, natural selection, gene flow, and non-random mating.
- Scientists use the Hardy-Weinberg model to compare real populations.
- The beak length of penguins follows a normal distribution curve.
- The majority of individuals have a beak length close to the mean.
- Extreme traits are not common in populations.
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