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| Galis, Frietson; Sinervo, Barry. |
| The early stages of organogenesis in metazoans differ drastically between higher order taxa such as phyla and classes. The segmented germ band stage in insects, the nauplius stage of crustaceans, and the neurula/pharyngula stage in vertebrates are examples of this diversification. In striking contrast with this divergence, is the similarity of these stages within these taxa, i.e., within insects, crustaceans, and vertebrates. The early stages of organogenesis, or phylotypic stages, have, thus, remained very similar in most species since the evolutionary origin of the taxa. These phylotypic stages are considerably more similar to each other than to the earlier stages of cleavage and gastrulation. Cleavage and gastrulation stages display not only great... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Evolutionary conservation; Pleiotropy; Cleavage; Gastrulation; Organogenesis; Multicellularity; Phylotypic stage. |
| Ano: 2002 |
URL: http://www.repository.naturalis.nl/record/534407 |
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| DAVID,JEAN R.. |
| Developmental biology and evolutionary biology are both mature integrative disciplines which started in the 19th century and then followed parallel and independent scientific pathways. Recently, a genetical component has stepped into both disciplines (developmental genetics and evolutionary genetics) pointing out the need for future convergent maturation. Indeed, the Evo-Devo approach is becoming popular among developmental biologists, based on the facts that distant groups share a common ancestry, that precise phylogenies can be worked out and that homologous genes often play similar roles during the development of very different organisms. In this essay, I try to show that the real future of Evo-Devo thinking is still broader. The evolutionary theory is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Quantitative genetics; Multicellularity; Analogy; Homology; Sexual reproduction. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652001000300008 |
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