| Family history is a broad indicator of genetic variation associated with disease and may serve as a proxy for laboratory-based testing. |
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| Members of plant species typically exhibit genetic variation in resistance and susceptibility to a particular disease. |
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| Mutation is the primary source of genetic variation upon which natural selection can act. |
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| On a broad scale, morphometric variation was concordant with genetic variation. |
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| Rare and endangered species are susceptible to loss of genetic variation through genetic drift in small populations. |
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| This last mechanism is known as canalization and can lead to the buildup of hidden or cryptic genetic variation. |
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| The range of genetic variation within a species or from readily hybridizable species may be limited. |
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| Despite the remarkable similarities among the genomes of various organisms, genomics also informs our notion of genetic variation. |
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| How can we account for such genetic variation and covariation of traits within the present framework? |
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| We also examine genetic variation in teosinte for several quantitative traits that differentiate maize and teosinte. |
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| Ancient DNA provides a temporal dimension to the study of genetic variation. |
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| Irish populations of Q. petraea may have gained additional genetic variation by admixture from the closely related pedunculate oak. |
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| Studies of genetic variation of morphological traits in natural populations of mammals are essential to understanding their evolution. |
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| Also, the distribution and extent of plant species and genetic variation are related to factors such as taxonomic status, life history and biogeographic history. |
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| In the context of the preliminary field reports, the low levels of genetic variation found within colonies appeared to result from consanguineous mating. |
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| Studies of highly kin-structured mammal societies have revealed the importance of natal philopatry in determining the distribution of genetic variation within populations. |
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| Going back to the 19th century, scientists have proposed that sexual reproduction makes natural selection more effective because it increases genetic variation. |
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| For conservation purposes, quantification of level and distribution of genetic variation can be obtained from morphometric traits, enzyme loci, and DNA sequences. |
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| Researchers hope to mine this mother lode of genetic variation to achieve cottons with higher yields, stronger fibers, improved seed quality, and other traits. |
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| Furthermore, studies using dominant genetic markers do not properly allow for the disentanglement between genetic variation within loci and within genotypes. |
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| Theoretical studies suggest that the joint effects of selection and linkage may lead to broadscale patterns of genetic variation in different genomic regions. |
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| He reviews the field from the genetic variation in plasma cholinesterase reported in 1956 to current investigations into interethnic frequency differences of enzyme variants. |
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| It will then be compared to small amounts of sequence from 10 to 20 other breeds, including the beagle, to study genetic variation within the canine species. |
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| Experiments that examine genetic variation and phenotypic plasticity in trees are often limited in replication or restricted to early seedling stages. |
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| Does the genetic variation of organelle DNAs in D. sinensis tend to become depauperate because of their small effective population size, as in many endangered species? |
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| He emphasised the variability within species, relativity of taxonomic criteria and the accumulation of genetic variation within a species. |
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| The modern evolutionary synthesis defines evolution as the change over time in this genetic variation. |
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| This form of the neutral theory is now largely abandoned, since it does not seem to fit the genetic variation seen in nature. |
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| A portion of all genetic variation is functionally neutral, producing no phenotypic effect or significant difference in fitness. |
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| Neutral events can radically reduce genetic variation through population bottlenecks. |
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| When genetic variation does not result in differences in fitness, selection cannot directly affect the frequency of such variation. |
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| As a result, the genetic variation at those sites is higher than at sites where variation does influence fitness. |
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| However, after a period with no new mutations, the genetic variation at these sites is eliminated due to genetic drift. |
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| Natural selection reduces genetic variation by eliminating maladapted individuals, and consequently the mutations that caused the maladaptation. |
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| In general, genetic variation between populations is significant, even among nearby populations. |
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| As a result of this genetic variation, other distinct species currently considered to be populations of common bottlenose dolphin are possible. |
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| Natural selection will only cause evolution if there is enough genetic variation in a population. |
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| Loss of this type is likely to lead to loss of genetic variation including local adaptation. |
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| The genetic variation within this clade shows only a limited regional variation, with the notable exception of Przewalski's horse. |
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| Within the human species, the greatest degree of genetic variation exists between males and females. |
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| Evaluating genetic variation and relationships among two bromegrass species and their hybrid using RAPD and AFLP markers. |
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| Environmental ontogenic and genetic variation in egg size of Pied Flycatchers. |
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| Temporal and spatial genetic variation within and among populations of the mosquito Culex tarsalis from California. |
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| He begins with genetic variation, describing the Hardy-Weinberg law, and variation in Drosopila. |
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| Relationships between life history characteristics and electrophoretically detectable genetic variation in plants. |
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| The useful genetic variation in North Dakota State University Corn Breeding Program could be potential source of new genes for improving genetic diversity in these regions. |
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| Codominant, multiallelic, and highly polymorphic microsatellite markers are suitable tools for examination of genetic variation and population structure. |
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| Researcher Irina Pugach and colleagues analysed genetic variation from across the genome from aboriginal Australians, New Guineans, island Southeast Asians, and Indians. |
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| This study examined genetic variation and population structure of 1023 saugers in 12 populations from the Midwest and Great Plains regions of North America. |
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| The clinal geographic genetic variation is further complicated by the migration and mixing between human populations which has been occurring since prehistoric times. |
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| Those aspects of genetic variation that give clues to human evolutionary history, or are relevant to medical research, have received particular attention. |
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| Due to the lack of genetic variation within subspecies, the environmental conditions in a given area likely plays the largest part in such weight variations. |
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| Glaciers forced the early human populations who had originally migrated from northeast Siberia into refugia, reshaping their genetic variation by mutation and drift. |
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| Over time, human genetic variation has formed a nested structure that is inconsistent with the concept of races that have evolved independently of one another. |
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| For this reason, there is no current consensus about whether racial categories can be considered to have significance for understanding human genetic variation. |
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| It is this genetic variation that underlies differences in phenotype. |
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