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Книга Evolution in the Dark Horst Wilkens

Evolution in the Dark

Автор: Horst Wilkens, Ulrike Strecker
Език: Английски език
Корици: С твърди корици
Издател: Springer-Verlag Berlin and Heidelberg GmbH & Co. KG
Наличност: Външен склад
Изпращаме след 10-13 дни
158.03 € 309.07 лв
This book provides fascinating insights into the development and genetics of evolutionary processes...

Информация за книгата

Автор
Horst Wilkens, Ulrike Strecker
Език
Английски език
Корици
Книга - С твърди корици
Издадена
2017
страници
217
EAN
9783662545102
ISBN
3662545101
Enbook ID
15870229
Издател
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG
Теглоt
5505
Размери
155 x 235 x 14

Пълно описание

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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