Quote:
Originally Posted by Biochemist
And this portion... is at odds with Moon's assertion that lateral gene transfer somehow resulted in a "merging" of life into a single common tree.
|
Quote:
Originally Posted by Biochemist
Informative post, G, but I don't know what point you were trying to make.
Bio
|
No, not at all.
You could have actually clicked on the articles and read them(there is no way you had enough time given the time elapsed between your responses). Making things up and just asking silly questions is not good science or debate. Would it have hurt you to try google?
From the wiki page on horizontal gene transfer, a quoted article by biochemist
Ford Doolittle, as published in Scientific American:
Quote:
Horizontal gene transfer - Wikipedia, the free encyclopedia
"If there had never been any lateral gene transfer, all these individual gene trees would have the same topology (the same branching order), and the ancestral genes at the root of each tree would have all been present in the last universal common ancestor, a single ancient cell. But extensive transfer means that neither is the case: gene trees will differ (although many will have regions of similar topology) and there would never have been a single cell that could be called the last universal common ancestor.[22]
"As Woese has written, 'the ancestor cannot have been a particular organism, a single organismal lineage. It was communal, a loosely knit, diverse conglomeration of primitive cells that evolved as a unit, and it eventually developed to a stage where it broke into several distinct communities, which in their turn became the three primary lines of descent (bacteria, archaea and eukaryotes)' In other words, early cells, each having relatively few genes, differed in many ways. By swapping genes freely, they shared various of their talents with their contemporaries. Eventually this collection of eclectic and changeable cells coalesced into the three basic domains known today. These domains become recognisable because much (though by no means all) of the gene transfer that occurs these days goes on within domains."[22]
|
http://shiva.msu.montana.edu/courses.../uprooting.pdf
From the first Zimmer article, may illustrate the point better for you:
Quote:
Originally Posted by Biochemist
Informative post, G, but I don't know what point you were trying to make.
Bio
|
Just wanted to further point out that you have no idea what you are talking about
