PHYLOGENETIC ANALYSIS: ROOTED AND UNROOTED TREES

BASIC GUIDELINE TO UNDERSTAND ROOTED AND UNROOTED TREES IN PHYLOGENETICS

 

What is a  PHYLOGENETIC TREE?

Phylogenetic trees represent hypothesis about the evolutionary relationships among a group of organisms. A phylogenetic tree may be built using morphological (body shape), biochemical, behavioral, or molecular features of species or other groups.In building a tree, we organize species into nested groups based on shared derived traits (traits different from those of the group's ancestor).

HOW TO DRAW A PHYLOGENETIC TREE?

In a phylogenetic tree, the species of interest are shown at the tips of the tree's branches. The branches themselves connect up in a way that represents the evolutionary history of the species that is, how we think they evolved from a common ancestor through a series of divergence (splitting-in-two) events.For more details watch the video below:

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