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Könyv Evolution in the Dark Horst Wilkens

Evolution in the Dark

Szerző: Horst Wilkens, Ulrike Strecker
Nyelv: Angol
Kötés: Kemény kötésű
Kiadó: Springer-Verlag Berlin and Heidelberg GmbH & Co. KG
Elérhetőség: Beszállítói készleten
Küldés 10-13 napon belül
57 690 Ft
This book provides fascinating insights into the development and genetics of evolutionary processes...

Információk a könyvről

Szerző
Horst Wilkens, Ulrike Strecker
Nyelv
Angol
Kötés
Könyv - Kemény kötésű
Kiadva
2017
oldal
217
EAN
9783662545102
ISBN
3662545101
Enbook ID
15870229
Kiadó
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG
Súly
5505
Méretek
155 x 235 x 14

Teljes leírás

This book provides fascinating insights into the development and genetics of evolutionary processes on the basis of animals living in the dark, such as the Astyanax cave fish. Biologically functionless traits show high variability, which results from neutral deleterious mutations no longer being eliminated by natural selection, which normally acts to preserve functional capability. These negative mutations accumulate until the traits they are responsible for become rudimentary or even lost. The random genetic basis of regressive evolution is in accordance with Nei's Neutral Theory of Molecular Evolution , which applies to the molecular level. Such processes are particularly conspicuous in species living in constant darkness, where, for example in Astyanax , all traits depending on the exposure to light, like eyes, pigmentation, visually triggered aggressive behaviour, negative phototaxis, and several peripheral outcomes of circadian rhythmicity, are useless and diminish. In compensation constructive traits like taste, olfaction or the lateral line senses are improved by selection and do not show variability. Regressive and constructive traits inherit independently, proving that the rudimentation process is not driven by pleiotropic linkage between them. All these traits are subject to mosaic evolution and exhibit unproportional epistatic gene effects, which play an important role in evolutionary adaptation and improvement. Offering valuable evolutionary insights and supplemented by a wealth of illustrations, this book will appeal to evolutionary and developmental biologists alike.

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