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    Unrooted Trees Relation to Five Taxa

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    We are given the following five sequence:
    Taxon 1, Taxon 2, Taxon 3, Taxon 4, Taxon 5
    TGCCAA, GGACAA, TGTCAA, TGTCAT, GGACAT

    a) In general, how many unrooted trees are there relation five taxa?

    b) Draw the following two trees. the first one has taxa 2 and 5 as sister taxa and taxa 1 and 3 as sister taxa. the second one has taxa 2 and 5 as sister taxa and taxa 3 and 4 as sister taxa.

    c) Determine the minimum number of mutations that would be required to explain the observed sequences based on each of the two trees that you drew in part (b).

    d) Based on the principle of parsimony, which of these trees would you argue bestfits the data?

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    Solution Preview

    See attached word file.

    OK - in general, we want to try and come up with close relatives - look for two taxa that only have one change between them and keep building that way. I will refer to the taxa as "T1, T2, etc" and the ...

    Solution Summary

    How many unrooted trees are the relation to five taxa are determined. The minimum number of mutations that would be required to explain the observed sequences based on each of the two trees that you drew are provided.

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