William Morse  wrote or quoted:

> We have had lots of good clean fun on this newsgroup debating the 
> relative contributions of drift and natural selection to evolution. But 
> as more and more sequence data becomes available, it is becoming clear 
> that both drifters and niche-pickers have missed the boat. Gene, 
> chromosome, and perhaps (if the above article is correct) even genome 
> duplication looms as a big kahuna in evolution, with drift and selection 
> only working their magic once duplication has created the raw material.

Shannon-wise, duplication adds very little information to a signal.

So - if you are using Shannon information as a metric to measure genetic 
change - duplicating the entire genome is a change of about the same
magnitude as a typical point mutation.
-- 
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