Ecological Speciation
... Chapman and A. P. Hendry report that, despite strong divergent selection, lake and stream stickleback from the Misty watershed do not exhibit positive assortative mate choice in laboratory experiments. These results are in contrast to the strong assortative mating observed in similar studies of othe ...
... Chapman and A. P. Hendry report that, despite strong divergent selection, lake and stream stickleback from the Misty watershed do not exhibit positive assortative mate choice in laboratory experiments. These results are in contrast to the strong assortative mating observed in similar studies of othe ...
Evolution Review
... ____ 52. In an unchanging environment selection in a well-adapted population is a. directional. b. disruptive. c. stabilizing. d. absent. e. random. ____ 53. Human infants of low or very high birth weights are less likely to survive than those of average weight. This outcome is an example of ____ se ...
... ____ 52. In an unchanging environment selection in a well-adapted population is a. directional. b. disruptive. c. stabilizing. d. absent. e. random. ____ 53. Human infants of low or very high birth weights are less likely to survive than those of average weight. This outcome is an example of ____ se ...
Geographically patterned variation in diapause and its relationship
... demonstrate the fitness consequences of traits produced by those alleles. Because natural selection acts through the differential fitness among individuals, it is necessary to show that heritable differences in a phenotypic trait affect fitness to declare a phenotypic trait adaptive. Examples of tra ...
... demonstrate the fitness consequences of traits produced by those alleles. Because natural selection acts through the differential fitness among individuals, it is necessary to show that heritable differences in a phenotypic trait affect fitness to declare a phenotypic trait adaptive. Examples of tra ...
Sympatric speciation in animals: the ugly duckling grows up
... PLEIOTROPY (and to a lesser extent, linkage), these authors pointed out that a genetic association between disruptively selected traits and mate choice does not rest exclusively on the build up of linkage disequilibrium between unlinked genes. This pivotal body of work showed that the models outline ...
... PLEIOTROPY (and to a lesser extent, linkage), these authors pointed out that a genetic association between disruptively selected traits and mate choice does not rest exclusively on the build up of linkage disequilibrium between unlinked genes. This pivotal body of work showed that the models outline ...
theodosius dobzhansky - National Academy of Sciences
... Two principal topics of Mankind Evolving are the interrelated concepts of human diversity and race. Dobzhansky's first major publication on these topics was Heredity, Race, and Society (1946), a book coauthored with L. C. Dunn, which was translated into many languages and sold more than one million ...
... Two principal topics of Mankind Evolving are the interrelated concepts of human diversity and race. Dobzhansky's first major publication on these topics was Heredity, Race, and Society (1946), a book coauthored with L. C. Dunn, which was translated into many languages and sold more than one million ...
Limnephilid taxa revised by speciation traits
... trait by reviewing several relevant topics in the sciences of taxonomy, molecular genetics and phylogenetics. Perspectives of integrative taxonomy is discussed in context of phenotype versus genotype, immensely complex phenotype versus phenomic challenge, taxonomic impediment versus genetic expedien ...
... trait by reviewing several relevant topics in the sciences of taxonomy, molecular genetics and phylogenetics. Perspectives of integrative taxonomy is discussed in context of phenotype versus genotype, immensely complex phenotype versus phenomic challenge, taxonomic impediment versus genetic expedien ...
Adaptive Speciation: Epilogue
... of these studies were conducted with the theory of adaptive speciation in mind, but they can be seen as starting points to disentangle the diversity of processes into the basic components depicted in Box 1. The chapters in Part B deal with cases of recent or ongoing genetic divergence under conditio ...
... of these studies were conducted with the theory of adaptive speciation in mind, but they can be seen as starting points to disentangle the diversity of processes into the basic components depicted in Box 1. The chapters in Part B deal with cases of recent or ongoing genetic divergence under conditio ...
Space, sympatry and speciation
... criterion of sympatry when discussing speciation in nature (e.g. Coyne & Orr, 2004), and for this reason alone it is not surprising that they regard sympatric speciation as exceedingly rare (though they give other reasons). Bolnick & Fitzpatrick (2007) also state that sympatric speciation is probabl ...
... criterion of sympatry when discussing speciation in nature (e.g. Coyne & Orr, 2004), and for this reason alone it is not surprising that they regard sympatric speciation as exceedingly rare (though they give other reasons). Bolnick & Fitzpatrick (2007) also state that sympatric speciation is probabl ...
How Does Climate Influence Speciation?
... becomes less suitable and the montane habitats more suitable over time. The lowland population may then become extinct if the species fails to adapt to higher temperatures, which leads to geographic isolation and eventual speciation of the montane populations. Under this pattern of spatial and tempo ...
... becomes less suitable and the montane habitats more suitable over time. The lowland population may then become extinct if the species fails to adapt to higher temperatures, which leads to geographic isolation and eventual speciation of the montane populations. Under this pattern of spatial and tempo ...
How Does Climate Influence Speciation?
... becomes less suitable and the montane habitats more suitable over time. The lowland population may then become extinct if the species fails to adapt to higher temperatures, which leads to geographic isolation and eventual speciation of the montane populations. Under this pattern of spatial and tempo ...
... becomes less suitable and the montane habitats more suitable over time. The lowland population may then become extinct if the species fails to adapt to higher temperatures, which leads to geographic isolation and eventual speciation of the montane populations. Under this pattern of spatial and tempo ...
Speciation Speciation Speciation Speciation
... pomonella until about 150 years ago, when the fly was observed on cultivated apple trees (introduced to the ...
... pomonella until about 150 years ago, when the fly was observed on cultivated apple trees (introduced to the ...
(1904–2005) Ernst Mayr and the integration of geographic and
... versus absence of a dorsal stripe. Populations rarely show fixed differences, but the unstriped morph is more common on Ceanothus (mean frequency = 81%) and the striped morph is more common on Adenostoma (mean frequency = 72%). Thus most, but not all, individuals of the Adenostoma ecotype are stripe ...
... versus absence of a dorsal stripe. Populations rarely show fixed differences, but the unstriped morph is more common on Ceanothus (mean frequency = 81%) and the striped morph is more common on Adenostoma (mean frequency = 72%). Thus most, but not all, individuals of the Adenostoma ecotype are stripe ...
Speciation genetics: current status and evolving approaches
... examples from nature where both extrinsic and intrinsic postzygotic isolation appear to be at work (e.g. Rogers & Bernatchez 2006; Rieseberg & Willis 2007; Fuller 2008). Some recent work suggests that extrinsic postzygotic isolation may be more common and more important than intrinsic postzygotic is ...
... examples from nature where both extrinsic and intrinsic postzygotic isolation appear to be at work (e.g. Rogers & Bernatchez 2006; Rieseberg & Willis 2007; Fuller 2008). Some recent work suggests that extrinsic postzygotic isolation may be more common and more important than intrinsic postzygotic is ...
Speciation genetics - Philosophical Transactions of the Royal
... examples from nature where both extrinsic and intrinsic postzygotic isolation appear to be at work (e.g. Rogers & Bernatchez 2006; Rieseberg & Willis 2007; Fuller 2008). Some recent work suggests that extrinsic postzygotic isolation may be more common and more important than intrinsic postzygotic is ...
... examples from nature where both extrinsic and intrinsic postzygotic isolation appear to be at work (e.g. Rogers & Bernatchez 2006; Rieseberg & Willis 2007; Fuller 2008). Some recent work suggests that extrinsic postzygotic isolation may be more common and more important than intrinsic postzygotic is ...
A framework for comparing processes of speciation in the
... physiological architecture. An example might be male and female body size, or perhaps a male acoustic signal and female preference that share a common underlying oscillator (Butlin & Ritchie 1989). For such traits, pleiotropy will be common. Nevertheless, it is perfectly possible for them to be infl ...
... physiological architecture. An example might be male and female body size, or perhaps a male acoustic signal and female preference that share a common underlying oscillator (Butlin & Ritchie 1989). For such traits, pleiotropy will be common. Nevertheless, it is perfectly possible for them to be infl ...
Sympatric speciation: when is it possible
... always comprise one or another parapatric feature, particularly among immobile organisms. However, a study of sympatric speciation in our definition, as well as other local models, is desirable, first, because of its simplicity, and, second, because under strong migration and sufficiently homogeneou ...
... always comprise one or another parapatric feature, particularly among immobile organisms. However, a study of sympatric speciation in our definition, as well as other local models, is desirable, first, because of its simplicity, and, second, because under strong migration and sufficiently homogeneou ...
The existence of species rests on a metastable
... very divergent view to that adopted by a majority of evolutionary biologists to this day. Rather, I choose to follow Wallace’s path against Darwin’s in thinking that natural selection plays a direct role in promoting the reproductive isolation that defines species, and I shall actually venture some ...
... very divergent view to that adopted by a majority of evolutionary biologists to this day. Rather, I choose to follow Wallace’s path against Darwin’s in thinking that natural selection plays a direct role in promoting the reproductive isolation that defines species, and I shall actually venture some ...
Adaptive speciation: the role of natural selection in mechanisms of
... the species (or, as he called it, the ÔformÕ) and, thus, that natural selection explained speciation after all.5 Others have argued that group or species selection accounted for the proliferation of new species. While suggestive, such accounts have encountered many serious difficulties. Most contempor ...
... the species (or, as he called it, the ÔformÕ) and, thus, that natural selection explained speciation after all.5 Others have argued that group or species selection accounted for the proliferation of new species. While suggestive, such accounts have encountered many serious difficulties. Most contempor ...
Competitive speciation
... Hutchinson’s thoughts have obvious implications for our consideration of sympatric speciation. If a way could be imagined for a species occupying a discrete niche space to colonize a neighbouring niche space, then intermediate phenotypes between it and its daughter colony would be unfit. This might ...
... Hutchinson’s thoughts have obvious implications for our consideration of sympatric speciation. If a way could be imagined for a species occupying a discrete niche space to colonize a neighbouring niche space, then intermediate phenotypes between it and its daughter colony would be unfit. This might ...
Document
... intrinsic incompatibilities are less likely to accumulate when gene flow is present6. This being said, adaptive divergence and ecological speciation are not the same. Divergent adaptation alone rarely causes sufficient reproductive isolation to allow the accumulation or persistence of species differ ...
... intrinsic incompatibilities are less likely to accumulate when gene flow is present6. This being said, adaptive divergence and ecological speciation are not the same. Divergent adaptation alone rarely causes sufficient reproductive isolation to allow the accumulation or persistence of species differ ...
Mating type and pheromone genes in the species complex: an evolutionary perspective
... fruiting body (Coppin et al. 1997; Pöggeler et al. 2006). Nuclei from each parent pair up in a process termed inter-nuclear recognition and a single pair is packaged into an ascus mother cell where karyogamy occurs. This is the only diploid stage in the life cycle of filamentous species, and it is i ...
... fruiting body (Coppin et al. 1997; Pöggeler et al. 2006). Nuclei from each parent pair up in a process termed inter-nuclear recognition and a single pair is packaged into an ascus mother cell where karyogamy occurs. This is the only diploid stage in the life cycle of filamentous species, and it is i ...
Speciation by Natural and Sexual Selection: Models and Experiments.
... isolation between some populations, they can provide the motor that can drive evolution of prezygotic isolation, and they give insights into the genetics of population divergence. Theoretical and empirical studies of postzygotic isolation are advancing rapidly, and interested readers should consult ...
... isolation between some populations, they can provide the motor that can drive evolution of prezygotic isolation, and they give insights into the genetics of population divergence. Theoretical and empirical studies of postzygotic isolation are advancing rapidly, and interested readers should consult ...
Genomics and the origin of species
... and whole-genome resequencing112 of population samples. Patterns in genome-wide divergence can be visualized and compared using, for example, FST kernel density plots and Manhattan plots98 (FIG. 1). Testing for signatures of introgression Various approaches are available to assess whether the sharin ...
... and whole-genome resequencing112 of population samples. Patterns in genome-wide divergence can be visualized and compared using, for example, FST kernel density plots and Manhattan plots98 (FIG. 1). Testing for signatures of introgression Various approaches are available to assess whether the sharin ...
Genomics and the origin of species - Integrative Biology
... and whole-genome resequencing112 of population samples. Patterns in genome-wide divergence can be visualized and compared using, for example, FST kernel density plots and Manhattan plots98 (FIG. 1). Testing for signatures of introgression Various approaches are available to assess whether the sharin ...
... and whole-genome resequencing112 of population samples. Patterns in genome-wide divergence can be visualized and compared using, for example, FST kernel density plots and Manhattan plots98 (FIG. 1). Testing for signatures of introgression Various approaches are available to assess whether the sharin ...