Species Relationships Based on Sequence Similarity

In the video, Dr. Tim White discusses using DNA sequences to make a phylogenetic tree. (36 seconds)

  • Molecular sequences (DNA, RNA, protein) can also be compared to study relationships.
  • In sequence comparison, as in anatomical comparison, we look for similarities and differences to deduce relationships.
  • When done properly, sequence comparison can be more objective and less ambiguous than anatomical comparison.