[Taxacom] Taxacom Digest, Vol 58, Issue 13
sevragorgia at gmail.com
Sat Jan 15 14:24:06 CST 2011
> Unfortunately, with DNA sequence data, one has to build the tree before being able to identify the
> putatively uniquely shared similarities since there is no way to do this beforehand for each character> since there are only four characters that replace each other rather than different character states as> in morphogenetics.
I don't get this.
Why is not possible to propose "uniquely shared similarities" from
Imagine you have 3 protein coding orthologous sequences with no gaps (to
avoid alignment sensitivity) belonging to three spp. Why is not possible
to establish that sp A and sp B share an A (or a His if you use
aminoacids) in position 35 of the sequence, or better say why is not
possible to treat this as an "uniquely shared similarity" before the
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