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Phylogenetic Tree and DNA

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DNA is a fundamental molecule in living things. Explain how it can be used to determine evolutionary relationships (establish a phylogenetic tree) between species.

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The expert examines phylogenetic trees and DNA.

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1. Genetic Similarities
Modern scientific analysis of the genes of living things has helped increase our understanding of evolution. All species alive share varying degrees of genetic similarity. More distantly related species show lesser degrees of genetic similarity, while more closely related species show more. Some are very closely related - there is an astounding 98% similarity between the genes of humans and the genes of chimpanzees.

This is evidence for evolution because: It shows the interrelatedness ...

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