{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,18]],"date-time":"2025-10-18T10:18:19Z","timestamp":1760782699794},"reference-count":36,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2005,2,5]],"date-time":"2005-02-05T00:00:00Z","timestamp":1107561600000},"content-version":"vor","delay-in-days":2898,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["BioEssays"],"published-print":{"date-parts":[[1997,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>To understand how morphological characters change during evolution, we need insight into the evolution of developmental processes. Comparative developmental approaches that make use of our fundamental understanding of development in certain model organisms have been initiated for different animal systems and flowering plants. Nematodes provide a useful experimental system with which to investigate the genetic and molecular alterations underlying evolutionary changes of cell fate specification in development, by comparing different species to the genetic model system <jats:italic>Caenorhabditis elegans.<\/jats:italic> In this review, I will first discuss the different types of evolutionary alterations seen at the cellular level by focusing mainly on the analysis of vulva development in different species. The observed alterations involve changes in cell lineage, cell migration and cell death, as well as induction and cell competence. I then describe a genetic approach in the nematode <jats:italic>Pristionchus pacificus<\/jats:italic> that might identify those genetic and molecular processes that cause evolutionary changes of cell fate specification.<\/jats:p>","DOI":"10.1002\/bies.950190308","type":"journal-article","created":{"date-parts":[[2005,2,25]],"date-time":"2005-02-25T07:21:30Z","timestamp":1109316090000},"page":"225-231","update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":28,"title":["Evolution and development \u2014 the nematode vulva as a case study"],"prefix":"10.1002","volume":"19","author":[{"given":"Ralf J.","family":"Sommer","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2005,2,5]]},"reference":[{"key":"e_1_2_1_2_2","volume-title":"The Nematode Caenorhabditis elegans","author":"Wood W. 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