Trichotomy problem

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HELISA
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Trichotomy problem

Post by HELISA » Thu May 04, 2006 10:15 pm

Hi Guys,
I am dealing now with the trichotomy problem, which is the problem of the relationship among the three species: human, gorilla and chimpanzee. Various gene trees were proposed to establish the most accurate relationship between these taxa. Some of them do not agree with the current understanding of the resolution of the trichotomy problem (overall molecular evidence is now strongly in favor that within the subfamily Homininae, gorillas are the outgroup, this suggests that chimpanzees should be in Hominini along with humans). Why is that? I’ve found some information which actually I do not understand, therefore I hope that somebody will explain me in simple words, why the following two reasons explain differences in various gene trees:
1)differential selection may cause parallel evolution
2)lineage sorting
Help me please
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kiekyon
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Post by kiekyon » Fri May 05, 2006 3:50 am


HELISA
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Post by HELISA » Fri May 05, 2006 4:04 pm

I'm sorry....the article didn't halep me at all... :?
Maybe somebody else has any idea bout this topic?
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HELISA
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Post by HELISA » Fri May 05, 2006 6:31 pm

Yee Ha! I've found the answer for my questions :-)
Please read http://mbe.oxfordjournals.org/cgi/reprint/19/9/1501.pdf
All the best!
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