Do cats prefer Nietzsche or Nabokov?  This is a silly question because the genes of a cat 
produce an awareness level which is not up to the task of understanding such things.  Genes 
effect memes.
Memes depend on environments created by genes.  As that environment changes, the memes that live 
in that environment must change or be replaced by more adaptive memes.  I participated in a 
thread like this about a year ago on Virus.  It should be in the archives.
The reverse idea, that memes effect genes, is called the Baldwin Effect.  This idea is a little 
more radical.  In fact, it's only resently resurfaced after decades of neglect because some 
experiments in Artifical Life seem to indicate that the Baldwin Effect actually exists and can 
be measured.
-- David Leeper Homo Deus http://home1.gte.net/dleeper/index.htm