Welcome to the Quiz!
This quiz contains 11 questions from a mix of 1 subtopics.
Which of the following is NOT a selection pressure?
climate change
predation
gene flow
competition for resources
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What is the effect of excess production of offspring on a population?
increased cooperation
competition for scarce resources
reduced genetic variation
decreased survival rates
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Which type of selection favours one extreme variant of a phenotype?
neutral selection
disruptive selection
stabilising selection
directional selection
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What is the effect of stabilising selection on a normal distribution curve?
no effect on the curve
shifts the curve in the direction of the favoured extreme
the curve shifts into multiple peaks
narrows the curve
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Which type of selection increases the frequency of alleles that code for multiple extreme phenotypes?
disruptive selection
balancing selection
directional selection
stabilising selection
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What is the effect of directional selection on allele frequency?
increases frequency of alleles that code for an average phenotype
increases frequency of alleles that code for an extreme phenotype
increases frequency of alleles that code for multiple extreme phenotypes
decreases frequency of alleles that code for an extreme phenotype
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What is an example of disruptive selection?
antibiotic resistance
bird beaks adapting to become larger and smaller
human birth weights
peppered moth colouration
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What is the effect of disruptive selection on a normal distribution curve?
the curve shifts into multiple peaks either side of where the average phenotype peak used to be
shifts the curve in the direction of the favoured extreme
no effect on the curve
narrows the curve
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Which of the following is an example of a selection pressure?
genetic drift
founder effect
disease
gene flow
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What is the effect of directional selection on a normal distribution curve?
narrows the curve
shifts the curve in the direction of the favoured extreme
no effect on the curve
the curve shifts into multiple peaks
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What is the effect of stabilising selection on allele frequency?
increases frequency of alleles that code for multiple extreme phenotypes
increases frequency of alleles that code for an average phenotype
increases frequency of alleles that code for an extreme phenotype
decreases frequency of alleles that code for an extreme phenotype
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