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What is the difference in the meaning between the lengths of lines in a phylogram and ultrametric tree?

User Msdos
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A phylogram is a phylogenetic tree where edge lengths signify time or genetic distance while an ultrametric tree or “chronogram” is a phylogenetic tree where edge lengths represent time. Also in an ultrametric tree, all tips of the tree are equidistant from the root of the tree. While a phylogram has dissimilar branch lengths which quantitatively signify the opposing degrees of change between the root and each terminal node.

User Rebooting
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