Abstract

FABREZI, Marissa. Epigénesis y epigenética: Ejemplos a partir de la morfología de los renacuajos. Cuad. herpetol. [online]. 2016, vol.30, n.1, pp.5-15. ISSN 1852-5768.

Epigenesis and epigenetics: Examples from the morphology of tadpoles. The epigenetic, as a scientific discipline that explores the mechanisms that give rise to new phenotypes with no genome alteration, emerged as a new approach related to innovations in Molecular Biology and Developmental Genetics. However, the concept of epigenesis was proposed long before the paradigms of evolution and the role of genes in the continuity of life could achieve scientific reputations. Herein, I analyzed the concepts of epigenesis and epigenetic from a broad biological perspective. Therefore, I used as cases of study the anurans of semiarid environments of North America, family Scaphiopodidae, and South America, family Ceratophryidae. In both cases, I present the causes of changes in the embryo-larval development that determine differences in the digestive tracts of those tadpoles from most of the anurans and also I emphasize on the molecular mechanisms that determine how this change occurs. By introducing the terms of epigenesis and epigenetic with these examples I intend to demonstrate the value to integrate multiple approaches to the study of animal development.

Keywords : Evolution; Development; Variation.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )