2.7 Inferring relationships of common ancestry
This clip addresses the question of how one might go about building a tree, or inferring relationships of common ancestry, by recognising evolutionary novelties, or shared derived characters, or synapomorphy. Dr. Patterson uses a diagram developed by Andrews and Martin to explain this, which he refers to as ‘number 5’. This is Figure 7. The clip ends with an explanation of Von Baer’s Law.