Evolució cromosòmica i de la mida genòmica en els animals Authors Eduard Petitpierre i Vall Abstract The chromosomal sets of animals are enormously variable in number and configuration. Their study can be performed through different levels of accuracy from the most elemental of karyology alpha to the highly sophisticated of karyology theta, such as the modern technique of «chromosome paintings». Some groups of animals are strikingly heterogeneous chromosomally whereas others share an amazing uniformity, and these differences can be interpreted by discussing the causes implied in the processes of karyological evolution. The particular cases of chromosomal polymorphisms, of the homosequencial karyotypes, indistinguishable in their banding patterns, and of the cryptic species, having almost identical morphologies but separable by their karyotypes, are briefly commented. The role of chromosomal changes in the origin of new species is illustrated by some representative examples and the possible correlations between chromosomal evolution versus molecular and organismic ones are also discussed. The genome size of animals shows a high variation which, in a great part, is not dependent on the organismic complexity and the number of genes. The evolutionary effects of the genome size and its nucleotypic effects, due to the nuclear DNA mass only, are finally dealt with, both at cellular and organismic levels. Downloads Download data is not yet available. Downloads Text complet (Català) Published 2009-04-22 Issue 60, 2009 : Cent cinquanta anys després de "L'origen de les espècies", de Darwin / Arcadi Navarro i Carmen Segarra, editors Section Articles License The intellectual property of the articles belongs to the respective authors. At the time of submitting the articles to Treballs de la Societat Catalana de Biologia, authors accept the following terms: — Authors assign to the SCB (a subsidiary of the Institut d’Estudis Catalans) the rights of reproduction, public communication (including communication through social networks) and distribution of the articles submitted for publication to Treballs de la Societat Catalana de Biologia, in any form and medium, including digital platforms. The Publications Committee reserves the right to accept or refuse submitted articles and the right to make any editorial changes it deems appropriate. If the suggested changes are accepted by authors, they should re-submit the article with such changes. — Authors answer to the SCB for the authorship and originality of submitted articles. In other words, authors assure that submitted articles do not contain fragments of works by other authors or fragments of their own previously published works; that the content of articles is original, and that the copyright of third parties is not infringed upon. Authors accept this responsibility and undertake to hold harmless the SCB for any loss or damage resulting from non-compliance with this obligation. Furthermore, they should include a statement in articles submitted to the journal regarding their responsibility for the content of the articles. — Authors are responsible for obtaining permission for the reproduction of all graphic material included in articles, and they should moreover ensure that images, videos, etc., have been created with the consent of the individuals appearing in them, and that material belonging to third parties is clearly identified and acknowledged as such within the text. Likewise, authors should provide the respective consents and authorisations to the SCB when submitting articles. — The SCB is exempt from any liability arising from the possible infringement of intellectual property rights by authors. In all cases, it undertakes to publish corrections, clarifications, retractions and apologies, if necessary. — Unless otherwise stated in the text or in the graphic material, the contents published in the journal are subject to an Attribution - NonCommercial - NoDerivs 3.0 Spain (by-nc-nd) license from Creative Commons, the full text of which may be consulted at https://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.en. Therefore, the general public is authorised to reproduce, distribute and communicate articles as long as their authorship and publishing entity are acknowledged, and no commercial use is made of them nor derivative work produced from them. — The journal is not responsible for the ideas and opinions expressed by the authors of published articles.
