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and modeling homology relationships. A third approach should be men-
tioned in conclusion: gene regulatory networks. The characterization of
gene regulatory networks controlling development is still a recent
field,
91
and data have often proven costly to produce even in one species.
It is to be hoped that, in the future, sufficient functional data will be
available from a wider array of species. This should allow mechanistic yet
large-scale studies of the control of morphological diversity by the
genome.
Acknowledgments
I thank Frédéric Bastian, Gilles Parmentier, and Julien Roux for their
help in preparing this chapter. Research in the laboratory of MRR was
supported by the EU program Crescendo, the Swiss National Science
Foundation, Etat de Vaud, the Swiss Institute of Bioinformatics, and the
Decrypthon program.
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