Sequence Differences and Evolutionary Relationships

Listen to Dr. Sarah Tishkoff explain how to use DNA to reconstruct evolutionary history. (54 seconds)

  • As explained in the video, evolutionarily related organisms share a common ancestor with an ancestral DNA sequence.
  • As organisms evolve and diverge, their DNA sequences accumulate differences, also known as mutations.
  • Two common types of mutations are called SNPs and Indels.