Divergence With Genetic Exchange

Author: Michael L. Arnold
Publisher: Oxford University Press
ISBN: 0198726023
Size: 55.92 MB
Format: PDF, ePub
View: 6526
Download Read Online
This research level text is suitable for senior undergraduate and graduate level students taking related courses in departments of genetics, ecology and evolution.

Evolution Through Genetic Exchange

Author: Michael L Arnold
Publisher: Oxford University Press
ISBN: 0198570066
Size: 38.75 MB
Format: PDF, Mobi
View: 147
Download Read Online
In this book, Arnold promotes the 'web-of-life' metaphor as a more appropriate representation of evolutionary change in all lifeforms.

Tropical Rainforests

Author: Eldredge Bermingham
Publisher: University of Chicago Press
ISBN: 0226044688
Size: 66.51 MB
Format: PDF, Kindle
View: 5223
Download Read Online
However, explanationsofexactlyhow theymightbe important, and speci>cdata on
the evolutionaryprocessesre- sponsible, have been lacking. Over the lastdecade,
the divergence-with-gene-?ow modelofspe- ciation has received strong support
from laboratory studies of Drosophila. Studies show that if populations are
experiencing strong divergent selection, they may diverge and become repro-
ductively isolated even if some genetic exchange occurs between them. Using
one ofthe ...

How And Why Species Multiply

Author: Peter R. Grant
Publisher: Princeton University Press
ISBN: 9780691133607
Size: 51.73 MB
Format: PDF, Kindle
View: 1781
Download Read Online
The second stage is dominated by genetic divergence. It starts with the origin of
genetic incompatibilities between hybridizing species. The potential to exchange
genes through intro- gressive hybridization diminishes, with fertility of hybrids
declining earlier than viability, and female hybrids exhibiting reduced fitness
earlier than male hybrids. The third and final stage begins with complete
cessation of gene exchange between at least two of the species in a radiation. In
birds this point is ...

Das Egoistische Gen

Author: Richard Dawkins
Publisher: Springer-Verlag
ISBN: 3642553915
Size: 67.27 MB
Format: PDF, Kindle
View: 4629
Download Read Online
Nach Richard Dawkins ́ vor über 30 Jahren entworfener und heute noch immer provozierender These steuern und dirigieren unsere von Generation zu Generation weitergegebenen Gene uns, um sich selbst zu erhalten.

Creative Conservation

Author: P.J. Olney
Publisher: Springer Science & Business Media
ISBN: 9401107211
Size: 65.54 MB
Format: PDF, Mobi
View: 823
Download Read Online
theextent of genetic divergence may strongly be affected by past demographic
fluctuations and habitat fragmentation (e.g. Wayne et al., 1992). In
considerationof ... If molecular and morphological analyses do not reveal
population differences, or if evidence exists for high rates ofgenetic exchange
between populations (e.g. Wayne et al., 1992), intermixing maybe advised so
longasfertility barriers (e.g. chromosomal differences) orsubtle adaptive
differences (e.g. populationsoccupy ...

Genomes And Genomics Of Nitrogen Fixing Organisms

Author: Rafael Palacios
Publisher: Springer Science & Business Media
ISBN: 1402030541
Size: 79.59 MB
Format: PDF, ePub, Mobi
View: 7567
Download Read Online
He also indicated that the role of genetic exchange among bacterial species is
markedly different than its role among eukaryotic species, in that bacterial genetic
exchange does not significantly hinder adaptive divergence. Consequently, he
suggested that there is no justification for classifying bacteria solely on the basis
of patterns of recombination. 11. A PROPOSED UNIFIED SPECIES CONCEPT
FOR BACTERIA Lawrence (2001) has proposed a Unified Species Concept (
USC) for ...

American Society For Microbiology News

Size: 26.59 MB
Format: PDF, ePub
View: 579
Download Read Online
according to the model, the neutral divergence among B. subtilis and its closest
relatives is destined to increase without bound. Genetic exchange between these
bacterial populations fails to constrain either their adaptive divergence or their
neutral sequence divergence. Genetic Exchange Can Create New Adaptive
Combinations of Alleles According to evolutionary biologists, one advantage of
sex lies in its ability to create new associations of alleles at different loci. For
example, if a ...

Progress And Prospects In Evolutionary Biology

Author: Jeffrey R. Powell
Publisher: Oxford University Press
ISBN: 9780195360325
Size: 14.87 MB
Format: PDF, ePub, Mobi
View: 3204
Download Read Online
Generally, reproductive isolation is divided into two major categories: premating
isolation and postmating isolation. In the former case, due primarily to behavioral
divergence, species do not exchange genes because they do not mate with one
another, regardless of whether fertile viable offspring could be produced.
Postmating isolation occurs after mating takes place but inhibits gene exchange
because the offspring of interspecific matings are not viable and/or fertile. Thus
one of the ...

Reticulate Evolution

Author: Nathalie Gontier
Publisher: Springer
ISBN: 3319163450
Size: 66.19 MB
Format: PDF
View: 4788
Download Read Online
Written for non-experts, this volume introduces the mechanisms that underlie reticulate evolution.