Punctuated equilibrium and molecular clocks? Dr. Peter
Gegenheimer PGegen at UKans.nolospamare.edu Fri Sep 4 18:37:39
EST 1998 On Wed, 2 Sep 1998 15:16:45, Johnjoe McFadden
<j.mcfadden at surrey.ac.uk> wrote: > Punctuated equilibrium and
molecular clocks? > The punctuated equilibrium hypothesis of
Gould and Eldridge, in which > evolution is proposed to go
through long periods of stasis interspersed > with bursts of
rapid evolution, is of course related to the fossil > record.
However, periods of rapid evolution should also leave their >
trace in molecular clocks. > Does the phylogenetic analysis of
protein gene sequences suggest that > their evolution has in
some cases been episodic? I guess the evidence, > if it existed,
would come from comparison of sequence divergence of a > protein
like globin with a molecular clock sequence (e.g. ribosomal RNA)
> for the same group of species. Is their any evidence that over
> geological periods of time (measured by the clock sequence)
the protein > undergoes episodic bo