Origin of Species - Biology Junction
... • At the southern end of the ring, the coastal and inland populations do not interbreed even when they overlap. • In this area they appear to be two separate species. ...
... • At the southern end of the ring, the coastal and inland populations do not interbreed even when they overlap. • In this area they appear to be two separate species. ...
Seven
... To compare the results obtained by our algorithm with some well-established genefinding program, we introduced new simple rules for deciding if a given ORF is coding or non-coding. For every ORF, we calculate 64-dimensional vector of it’s codon frequencies and find the closest centroid in the codon ...
... To compare the results obtained by our algorithm with some well-established genefinding program, we introduced new simple rules for deciding if a given ORF is coding or non-coding. For every ORF, we calculate 64-dimensional vector of it’s codon frequencies and find the closest centroid in the codon ...
Ecologists are studying how genetic and environmental factors can
... known as ocean acidification. Researchers set up an experiment to test whether a population of algae that are normally harmed by a low pH could adapt to the acidification. Algae were exposed, for a period of one year (about 500 generations), to different degrees of ocean acidification, as shown in t ...
... known as ocean acidification. Researchers set up an experiment to test whether a population of algae that are normally harmed by a low pH could adapt to the acidification. Algae were exposed, for a period of one year (about 500 generations), to different degrees of ocean acidification, as shown in t ...
Genetic diversity and differentiation in Camellia reticulata - Funpec-RP
... seldom seen. C. reticulata is one of them. Origin, differentiation, and distribution are basic aspects in the understanding of a species, but these characteristics are complicated in C. reticulata, not only because it is a polyploid complex but also because it is sympatric with some related species. ...
... seldom seen. C. reticulata is one of them. Origin, differentiation, and distribution are basic aspects in the understanding of a species, but these characteristics are complicated in C. reticulata, not only because it is a polyploid complex but also because it is sympatric with some related species. ...
video slide - apbiologyclass
... • Hybrid breakdown: Some first-generation hybrids are fertile, but when they mate with another species or with either parent species, offspring of the next generation are feeble or sterile ...
... • Hybrid breakdown: Some first-generation hybrids are fertile, but when they mate with another species or with either parent species, offspring of the next generation are feeble or sterile ...
1 Mathematical Population Genetics Introduction to the
... mt DNA sequences from 63 individuals. The sample approximated a random sample of individuals in the tribe, to the extent to which this can be experimentally arranged. Each sequence is the first 360 basepair segment of the control region. The region comprises 201 pyrimidine sites and 159 purine sites ...
... mt DNA sequences from 63 individuals. The sample approximated a random sample of individuals in the tribe, to the extent to which this can be experimentally arranged. Each sequence is the first 360 basepair segment of the control region. The region comprises 201 pyrimidine sites and 159 purine sites ...
Package `miRNAtap`
... and their aggregation. Three aggregation methods are available: minimum, maximum and geometric mean, additional parameters provide further tuning of the results. Predictions are available for Homo sapiens, Mus musculus and Rattus norvegicus (the last one through homology translation). ...
... and their aggregation. Three aggregation methods are available: minimum, maximum and geometric mean, additional parameters provide further tuning of the results. Predictions are available for Homo sapiens, Mus musculus and Rattus norvegicus (the last one through homology translation). ...
440species1 - eweb.furman.edu
... - Biological units are genetically defined; reproductive isolation makes populations different from one another, creating new units. So, reproductive isolation is the key characteristic of a species. - Limitations: - not applicable to asexual species - hybridization occurs in nature, even between ot ...
... - Biological units are genetically defined; reproductive isolation makes populations different from one another, creating new units. So, reproductive isolation is the key characteristic of a species. - Limitations: - not applicable to asexual species - hybridization occurs in nature, even between ot ...
Genetic variation in nineShoreaspecies (Dipterocarpaceae) in
... markers have been detected showing high-frequency differences among species and between regions within species. Sequence information of these markers can be used to develop specific polymerase chain reaction markers for wood identification. The possibility of interspecific hybridization was discusse ...
... markers have been detected showing high-frequency differences among species and between regions within species. Sequence information of these markers can be used to develop specific polymerase chain reaction markers for wood identification. The possibility of interspecific hybridization was discusse ...
Technical guidelines for genetic conservation and use for lime (Tilia
... should be given high priority, as large genetic variation is expected to be present in the core distribution area. In general, Tilia occurs in mixed species forest and is associated with a number of different plant species. Existing protected areas will only partly serve as genetic conservation area ...
... should be given high priority, as large genetic variation is expected to be present in the core distribution area. In general, Tilia occurs in mixed species forest and is associated with a number of different plant species. Existing protected areas will only partly serve as genetic conservation area ...
Is this a new species, hybrid or maybe phenotypic plasticity results
... Individual populations vary considerably in respect of the colour of the labellum and the pattern on it. No two identical specimens in respect of the colour and shape of the labellum as well as its pattern were found in the populations although the colour of the flowers and the pattern on the labell ...
... Individual populations vary considerably in respect of the colour of the labellum and the pattern on it. No two identical specimens in respect of the colour and shape of the labellum as well as its pattern were found in the populations although the colour of the flowers and the pattern on the labell ...
Neutrality: A Necessity for Self-Adaptation
... important, because the best setting of an EA is usually not known a priori for a given task and a constant search strategy is usually not optimal during the evolutionary process. One way to adapt the search strategy online is self-adaptation, see [4] for an overview. This method can be described as ...
... important, because the best setting of an EA is usually not known a priori for a given task and a constant search strategy is usually not optimal during the evolutionary process. One way to adapt the search strategy online is self-adaptation, see [4] for an overview. This method can be described as ...
Analysis of the 18S rRNA genes of Sarcocystis species suggests
... species, and 1.8–2.6% (mean 2.20) between S. hirsuta and S. fusiformis, the latter was the closest interspecific pair collected from different intermediate hosts (cattle and water buffalo). Sequence divergence was 0.2–1.0% (mean 0.70) between S. hirsuta and the S. hirsuta-like taxon (which included ...
... species, and 1.8–2.6% (mean 2.20) between S. hirsuta and S. fusiformis, the latter was the closest interspecific pair collected from different intermediate hosts (cattle and water buffalo). Sequence divergence was 0.2–1.0% (mean 0.70) between S. hirsuta and the S. hirsuta-like taxon (which included ...
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.