Sentences with phrase «of alleles»

Today, evolution is defined as the change in the frequency of alleles in populations over time.
Still, because they carry random combinations of alleles from the C57BL / 6 and 129 genetic backgrounds, they are more appropriate controls than are mice of either parental strain.
The linear subtype is propelled by just two driver events: a genetic condition called von Hippel - Lindau syndrome, and loss of one copy of an allele in chromosome 3.
Estimating effective paternity number in social insects and the effective number of alleles in a population.
The average number of alleles per locus was similar to other pure breeds that have been diversity tested.15 However, an examination of the average effective alleles per locus indicates that only one or two alleles are actually contributing to the overall genotype and phenotype diversity of the breed.
In conclusion, there exists a robust relationship between the cultural construct individualism — collectivism and the prevalence of alleles at several polymorphisms with apparent psychological effects.
The new passenger pigeons (birds carrying a fully edited set of alleles from each parent) will form the first true generation of de-extinct passenger pigeons.
The new passenger pigeons (birds carrying a fully edited set of alleles from each parent) will form the first true generation of de-extinct passenger pigeons.
Martins RN, Association of alleles carried at TNFA - 850 and BAT1 - 22 with Alzheimer's disease.
And I have two copies of the allele associated with sleep cycles, which means I'm a morning person and the best time for me to work out is around noon.
Therefore, applications that require simultaneous modification of all alleles of a gene, or which require modifying multiple genes simultaneously in the same cell, are more appropriate for a CRISPR - based approach.
It represents the chance that a dog will inherit a homozygous pair of alleles from an ancestor on both sides of the pedigree, or that a given percentage of a dog's genes will have homozygous genes (i.e. the same genes).
Many of these alleles relate to polygenic factors (factors under the control of many genes) such as conformation, health and general vitality.
The gradual loss of alleles from populations is known as «genetic drift», this is a random process which occurs naturally in all populations; it may not matter much in the large gene pool of a large population, but becomes increasingly serious over time in the small gene pools of smaller populations.
To facilitate the analysis, the team developed a user - friendly program called Allelome.PRO, that can easily be applied to similar datasets in mice and other species, a valuable tool for the community to investigate regulation of allele activity.
«Carriers of this allele had a roughly 2-fold increase in risk for PTSD.»
In his paper, Mr Gellatly demonstrates that it is likely men carry two different types of allele, which results in three possible combinations in a gene that controls the ratio of X and Y sperm;
As a genetic explorer Peltonen has followed the movement of populations in history, knowing that genes had diversified during the moves, but in Finland as elsewhere only a tiny fraction of the alleles and health risks are distinctive.
Estimation of allele frequency and association mapping using next - generation sequencing data Kim, S. Y., K. E. Lohmueller, A. Albrechtsen, Y. Li et al. 2011.
The graph shows the global frequency pattern of an allele adaptive to vegetarian diets.
Jeff Carroll has also advised WAVE Life Sciences and was involved in the early development of allele - selective ASO molecules with Ionis.
We accumulated the total number of alleles shared between each ancient sample and each modern reference population, and stratified by allele count in the reference population, up to allele count nine (Supplementary Data 1).
Given that there is a higher prevalence of these putative social sensitivity alleles in East Asian populations than in Caucasian populations, there may be a relationship between the relative proportion of these alleles and the predominant cultural forms in a population.
The frequency of that allele increases so rapidly that there's no time for recombination — the shuffling of nearby genes — to take place.
A genome - wide comparative DNA analysis using 400 markers found a region on chromosome 4 that had a higher than expected amount of allele - sharing among the geriatrics.
By reading thousands of alleles and estimating mutation rates, the duo can work out the separation date for each allele and calculate past population sizes.
«If a new mutation arose in a certain population and it was strongly favored, natural selection would drive the frequency of that allele up very quickly,» he says.
Those individuals with the fittest combination of alleles produce more offspring.
In the second tree (B) the grandfather is ff, so all his children are female, they have the ff combination of alleles because their father and mother were both ff.
The alleles for lactose intolerance and lactose tolerance represent time - tested genes of the human race, just the opposite of the alleles of the Finnish Disease Heritage, which are native born and recent.
Genetic recombination is the transmission - genetic process by which the combinations of alleles observed at different loci in two parental individuals become shuffled in offspring individuals.
In an approach similar to Peltonen's discovery of the allele for lactose intolerance, Juha Kere of the University of Helsinki and his colleagues have linked versions of Kainuu genes to asthma.
To analyze the origin of these alleles, the scientists looked at bone marrow registries containing the HLA genes of millions of people from all parts of the globe.
The downside is that someone with two copies of the allele suffers from sickle - cell anemia, an incurable blood disorder.
The defense works like this: Having a single copy of the allele confers protection from severe malarial infection by somehow rendering the red blood cell less hospitable to the malaria parasite, Plasmodium falciparum.
As it turns out, despite the initial skepticism about the importance of gene flow, modern empirical and theoretical research using up - to - date molecular and DNA techniques have shown us not only how surprisingly far the flow of genes between distant plant populations can be, but also that the flow of alleles among populations is just as important, if not more so in some cases, as natural selection.
Favorable alleles are likely to spread across more than two lines; therefore, requiring the assembly of alleles from different sources in a single inbred line to achieve significant improvement.
It does, of course, most popularly through positive selection acting to increase the frequency of beneficial alleles, and also (and perhaps more often) through purifying selection acting to remove deleterious alleles, or through balancing selection to maintain a balance of alleles that might be harmful under some conditions and helpful under others.
However, most point mutations occur at low frequency, and the function of these alleles remains undefined.
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