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SlideshowReport

Case 2: The outgroups do not help resolve the polytomy

Description
When the outgroups share a common trait with two of the members of the polytomy, we get no information from that trait to help us resolve the polytomy. The observed pattern requires only one evolutionary event, depicted at the red arrow, regardless of how the polytomy is resolved. 01 = out- group 1; 02 = outgroup 2.
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