Adaptive Mutation: Has the Unicorn Landed?

Genetics ◽  
1998 ◽  
Vol 148 (4) ◽  
pp. 1453-1459 ◽  
Author(s):  
Patricia L Foster

AbstractReversion of an episomal Lac− allele during lactose selection has been studied as a model for adaptive mutation. Although recent results show that the mutations that arise during selection are not “adaptive” in the original sense, the mutagenic mechanism that produces these mutations may nonetheless be of evolutionary significance. In addition, a transient mutational state induced in a subpopulation of starving cells could provide a species with a mechanism for adaptive evolution.

2017 ◽  
Vol 2017 (1) ◽  
pp. 77-96
Author(s):  
Alexander Kozin

This article seeks to disclose the sense(s) of translation by attending to it in the phenomenological key with Edmund Husserl’s The Origin of Geometry. I suggest that the text could be approached through the prism of generative phenomenology, and I investigate it from two different perspectives: xenological and Derridean. Both perspectives are employed toward the same objective: to demonstrate the theoretical relevance of Husserl’s text to the understanding of a complex social phenomenon such as translation. The emphasis on sociality, historicity, and tradition, as these themes transpire in The Origin, brings about a new understanding of translation as a phenomenon of the liminal in-between, with its basic structure defined as the encounter with the alien. Derrida gives this emphasis much attention in his commentary on The Origin. In this commentary, he focuses on the constitution of a communal history, which is not possible without the iteration of the origin, the basic means of which is communication on the general level, while on the level of different socio-cultural worlds translation comes up as the most optimal mode for the encounter with the alien. The encounter takes place in the liminal in-between which points to repeatability as the original sense of translation inscribed in the acts of binding and approximation.


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