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Microevolution: Genetic Variation and Evolution

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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?

Increases genetic variation Signup and view all the answers

What is the sum of allele frequencies in a population?

Always equal to 1 Signup and view all the answers

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

Meeting the Hardy-Weinberg principle Signup and view all the answers

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

Allele frequencies remain constant over generations Signup and view all the answers

What is the effect of genetic drift on genetic variation?

It decreases genetic variation by losing alleles Signup and view all the answers

Which of the following is an example of natural selection?

The increase in frequency of an allele that confers resistance to DDT 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?

5% 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?

Founder effect Signup and view all the answers

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

Natural selection, genetic drift, gene flow Signup and view all the answers