Let's stop again to review the main points from this section.
Here is an important idea to remember:
Lineages can be traced back in time to find a point of common ancestry.
This can be shown by a diagram like the one at left.
Click
on the green dot that represents the most recent common ancestor for B and C.
Now that we have reviewed these points, let's move on to Folder 3, where
you will learn how features are used to determine ancestry.
Click on the green dot that represents the most recent common ancestor for A
and C.
Click on the part of the diagram that represents the shared history of A, B
and C.
Click on the part of the diagram that represents the unique history of B.