Microevolution: Genetic Variation and Evolution
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Questions and Answers

What is the primary requirement for evolution to occur?

  • High mutation rates
  • Variation in environmental influences
  • Genetic variation among individuals (correct)
  • Gene duplication events

What is the result of natural selection?

  • Gene duplication
  • Adaptive evolution (correct)
  • Increased genetic variation
  • Random changes in allele frequencies

What is the purpose of the Hardy-Weinberg equation?

  • To calculate allele frequencies
  • To determine the mutation rate
  • To test whether a population is evolving (correct)
  • To predict gene duplication events

What is the effect of gene duplication on genetic variation?

<p>Increases genetic variation (C)</p> Signup and view all the answers

What is the sum of allele frequencies in a population?

<p>Always equal to 1 (B)</p> Signup and view all the answers

What is the condition for a population to be considered non-evolving?

<p>Meeting the Hardy-Weinberg principle (C)</p> Signup and view all the answers

What is the primary assumption of the Hardy-Weinberg Principle?

<p>Allele frequencies remain constant over generations (D)</p> Signup and view all the answers

What is the effect of genetic drift on genetic variation?

<p>It decreases genetic variation by losing alleles (A)</p> Signup and view all the answers

Which of the following is an example of natural selection?

<p>The increase in frequency of an allele that confers resistance to DDT (A)</p> Signup and view all the answers

What is the percentage of carriers for PKU in the population, given that 1/10,000 babies in the US have the disease?

<p>5% (C)</p> Signup and view all the answers

What is the name of the phenomenon where a small group of individuals establishes a new population, leading to a loss of genetic variation?

<p>Founder effect (B)</p> Signup and view all the answers

What are the three major factors that alter allele frequencies and bring about most evolutionary change?

<p>Natural selection, genetic drift, gene flow (B)</p> Signup and view all the answers

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