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Genetic Comparisons
It's not only physical features which set different species apart, there's several
features in organisms which we can look at to compare how closely related
different species are to one another. We can do this by comparing DNA base
sequences, amino acid sequences and immunological features.


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As you can see from the following table, species 2 and species 3 are the most
closely related because their amino acid sequence is the most similar.

Species 1 Phe Met Arg Ser Glu Val Ala
Species 2 Phe Ala Arg Ser Glu Met Ala
Species 3 Phe Ala Arg…


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