Distribution and Concordance of N-Acetyltransferase Genotype and
... NAT2.4 Polymorphisms of NAT2 are known to result in variation of acetylation activity and have been associated with the incidence of several diseases (5). Generally, single-nt substitutions in NAT2 result in low activity, decreased expression, and enzyme instability (23). A slow acetylator phenotype ...
... NAT2.4 Polymorphisms of NAT2 are known to result in variation of acetylation activity and have been associated with the incidence of several diseases (5). Generally, single-nt substitutions in NAT2 result in low activity, decreased expression, and enzyme instability (23). A slow acetylator phenotype ...
Reproductive isolation and introgression between sympatric
... M. nasutus grows in clumps of moss located in flowing water on rocks that dry out in early May. Greater numbers of M. guttatus tend to occur in northern parts of the meadow, with M. nasutus predominating to the south. However, the microhabitats are patchy, and the two species often grow very close t ...
... M. nasutus grows in clumps of moss located in flowing water on rocks that dry out in early May. Greater numbers of M. guttatus tend to occur in northern parts of the meadow, with M. nasutus predominating to the south. However, the microhabitats are patchy, and the two species often grow very close t ...
Model-Based Clustering for Expression Data via a Dirichlet Process
... heuristic schemes, such as the ability to assess uncertainty about the resulting clustering and to formally estimate the number of clusters. This chapter describes a model-based clustering procedure for microarray expression data based on a well-defined statistical model, specifically, a conjugate D ...
... heuristic schemes, such as the ability to assess uncertainty about the resulting clustering and to formally estimate the number of clusters. This chapter describes a model-based clustering procedure for microarray expression data based on a well-defined statistical model, specifically, a conjugate D ...
Evolutionary ecology of plant-plant interactions
... and Weiner 2000). Other biotic factors that controls plant establishment ...
... and Weiner 2000). Other biotic factors that controls plant establishment ...
The infinitesimal model
... down into components, and that the phenotypic observation of constant within-family variance is consistent with a large number of Mendelian factors, with additive effects. This limiting model has become known as the infinitesimal model, and can be extended to include all the evolutionary processes: re ...
... down into components, and that the phenotypic observation of constant within-family variance is consistent with a large number of Mendelian factors, with additive effects. This limiting model has become known as the infinitesimal model, and can be extended to include all the evolutionary processes: re ...
The relation between reproductive value and genetic contribution
... a Galton-Watson branching process with Poisson offspring distribution with mean 2 (which can be investigated analytically). To understand this result, first observe that the probability that a particular gene is passed down a particular line of descent spanning t successive generations is 2−t and so ...
... a Galton-Watson branching process with Poisson offspring distribution with mean 2 (which can be investigated analytically). To understand this result, first observe that the probability that a particular gene is passed down a particular line of descent spanning t successive generations is 2−t and so ...
What role does natural selection play in speciation?
... between ancestral and derived alleles in the same lineage; the root could lie anywhere on the path connecting the present-day populations; figure 1.) Orr & Turelli (2001) assume that there is a highly skewed distribution of fitness effects, with a very small fraction of allelic combinations showing ...
... between ancestral and derived alleles in the same lineage; the root could lie anywhere on the path connecting the present-day populations; figure 1.) Orr & Turelli (2001) assume that there is a highly skewed distribution of fitness effects, with a very small fraction of allelic combinations showing ...
ADAPT, MOVE OR PERISH THE INTERACTION OF GENETICS
... Any observed genetic differentiation between populations is thus the result of local adaptation, genetic drift, and/or founder events. In the case of local adaptation, increased gene flow among populations may have an adverse effect because it impedes the adaptation process through gene swamping (Br ...
... Any observed genetic differentiation between populations is thus the result of local adaptation, genetic drift, and/or founder events. In the case of local adaptation, increased gene flow among populations may have an adverse effect because it impedes the adaptation process through gene swamping (Br ...
Species distribution
Species distribution is the manner in which a biological taxon is spatially arranged. Species distribution is not to be confused with dispersal, which is the movement of individuals away from their area of origin or from centers of high population density. A similar concept is the species range. A species range is often represented with a species range map. Biogeographers try to understand the factors determining a species' distribution. The pattern of distribution is not permanent for each species. Distribution patterns can change seasonally, in response to the availability of resources, and also depending on the scale at which they are viewed. Dispersion usually takes place at the time of reproduction. Populations within a species are translocated through many methods, including dispersal by people, wind, water and animals. Humans are one of the largest distributors due to the current trends in globalization and the expanse of the transportation industry. For example, large tankers often fill their ballasts with water at one port and empty them in another, causing a wider distribution of aquatic species.Biogeography is the study of the distribution of biodiversity over space and time. It is very useful in understanding species distribution through factors such as speciation, extinction, continental drift, glaciation, variation of sea levels, river capture and available resources. This branch of study not only gives a description of the species distribution, but also a geographical explanation for the distribution of particular species. The traditional biogeographic regions were first modeled by Alfred Wallace in The Geographical Distribution of Animals (1876). These were based on the work of Sclater's terrestrial biogeographic regions. Wallace's system was based on both birds and vertebrates, including non-flying mammals, which better reflect the natural divisions of the Earth due to their limited dispersal abilities.