A Tree in the Jungle of Gene Histories: Or, don't trip on the vines

Gary J. Olsen, University of Illinois

One of the most exciting realizations in recent years is the profound impact of gene transfer on evolution. Due to horizontal gene transfer, not all genes share a common history with the organisms in which we find them. Over the history of life, most (possibly all) genes have been transferred, and hence they tell different stories about the history of life. It has become common to assert that the very concept of a Tree of Life is meaningless. I will discuss the magnitude of gene exchange, and consider whether this does indeed vitiate a Tree of Life.

The P/T Colloquium is
typically held each
Thursday, 3:45–5:00 PM.
Refreshments are served
at 3:15 PM.