Genetic Drift and Population Size
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Questions and Answers

What is the result of an error in DNA replication?

  • Genetic drift
  • Natural selection
  • Mutation (correct)
  • Gene ow

What is the probability of a point mutation in higher plants and animals?

  • 1 in a billion (10–9) (correct)
  • 1 in a trillion
  • 1 in 1000
  • 1 in 10

What is the term for a change in a single nucleotide?

  • Gene duplication
  • Point mutation (correct)
  • Natural selection
  • Genetic drift

What can occur when whole chromosomes are duplicated?

<p>Down’s syndrome (B)</p> Signup and view all the answers

What is the risk of trisomy 21 in the US population?

<p>Between 1/650 and 1/1000 (C)</p> Signup and view all the answers

What can be created when a duplication occurs in a gene?

<p>A second copy of a gene (D)</p> Signup and view all the answers

What is an example of a triploid organism?

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

What can occur if there is no reduction division during meiosis?

<p>Diploid gametes (D)</p> Signup and view all the answers

What is the term for whole genomes being duplicated?

<p>Polyploid (A)</p> Signup and view all the answers

What increases the risk of trisomy 21?

<p>Maternal age (B)</p> Signup and view all the answers

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