Identify one type of molecular evidence that could have been used to develop a mammalian evolutionary tree, and describe one specific way that the evidence could have been used to construct a evolutionary tree.

One type of molecular evidence that could have been used to develop a mammalian evolutionary tree is the linear order of nucleotides in the Cytochrome Oxidase COI gene.

What is genetic variation?

Genetic variation refers to the linear order of nucleotides in the chromosomes (DNA molecule) present in an organism.

Genetic variation may exhibit the evolutionary relationships between different species.

In consequence, the linear order of nucleotides in a given sequence of DNA (for example, the COI gene) can be used to trace the evolution of mammalian species.

In conclusion, one type of molecular evidence that could have been used to develop a mammalian evolutionary tree is the linear order of nucleotides in the Cytochrome Oxidase COI gene.

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