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State change and trait fixation

  • Author: D. Baum

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State change and trait fixation
When a trait is shown to change state on the branches of a phylogenetic tree, whether with a change of branch color (as shown) or a mark on the branch, the event is usually understood to represent both the original occurrence of the derived trait and its eventual fixation.

This image is linked to the following Scitable pages:

Trait Evolution on a Phylogenetic Tree: Relatedness, Similarity, and the Myth of Evolutionary Advancement

What do phylogenetic trees illustrate? These diagrams don't just organize knowledge of biodiversity - they also show us that living species are the summation of their evolutionary history.

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