Natural selection and microevolution

Question 1

natural selection

Answer 1

where the pressures of environmental selection confer a selective advantage on a specific phenotype to enhance its viability and fecundity

Question 2

positive selection

Answer 2

selection that favours a heritable trait and the allele for that trait will increase within a population

Question 3

negative selection

Answer 3

selection that disfavours a heritable trait and the allele for that trait will decrease within a population

Question 4

stabilising selection

Answer 4

natural selection of a particular variant (mean) of a characteristic that maintains consistency of a population; occurs in times of environmental stability

Question 5

directional selection

Answer 5

natural selection that favours one phenotypic extreme causing the allele frequency to shift over time in the direction of that phenotype

Question 6

disruptive selection

Answer 6

natural selection favouring individuals with extreme phenotypes

Question 7

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Answer 7

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