Re: The driving force of evolution

On Aug 3, 8:02 pm, first_name@xxxxxxxxxxxxx (Florian) wrote:
Published this week in PNAS.

"The new mutation theory of phenotypic evolution" by Masatoshi Nei
PNAS | July 24, 2007 | vol. 104 | no. 30 | 12235-12242

Abstract

Recent studies of developmental biology have shown that the genes
controlling phenotypic characters expressed in the early stage of
development are highly conserved and that recent evolutionary changes
have occurred primarily in the characters expressed in later stages of
development.
Recent? I think this is called von Bauer's Scholum.
Even the genes controlling the latter characters are
generally conserved, but there is a large component of neutral or nearly
neutral genetic variation within and between closely related species.
Phenotypic evolution occurs primarily by mutation of genes that interact
with one another in the developmental process.
The details of how the genes work, especially the regulatory genes,
are currently the hottest topic in biology. However, I still don't
think it is new that the timing of genes in the embryo is conservative.


.

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