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Average time to fixation N e is the effective population size, the number of individuals in an idealised population under genetic drift required to produce an equivalent amount of genetic diversity. Usually the population statistic used to define effective population size is heterozygosity, but others can be used.
The two key driving forces behind fixation are natural selection and genetic drift. Natural selection was postulated by Charles Darwin and encompasses many processes that lead to the differential survival of organisms due to genetic or phenotypic differences. Genetic drift is the process by which allele frequencies fluctuate within populations.
The fixation index (F ST) is a measure of population differentiation due to genetic structure. It is frequently estimated from genetic polymorphism data, such as single-nucleotide polymorphisms (SNP) or microsatellites. Developed as a special case of Wright's F-statistics, it is one of the most commonly used statistics in population genetics ...
In population genetics, F-statistics (also known as fixation indices) describe the statistically expected level of heterozygosity in a population; more specifically the expected degree of (usually) a reduction in heterozygosity when compared to Hardy–Weinberg expectation.
The probability that A reaches fixation is called fixation probability. For the simple Moran process this probability is x i = i / N . Since all individuals have the same fitness, they also have the same chance of becoming the ancestor of the whole population; this probability is 1 / N and thus the sum of all i probabilities ...
Fixation (population genetics), the state when every individual in a population has the same allele at a particular locus Fixation (psychology) , the state in which an individual becomes obsessed with an attachment to another human, an animal, or an inanimate object
Orthorexia is a fixation on eating “clean,” as defined by a set of rules dependent on certain individuals and the context they live in, said Dr. Jennifer Gaudiani, an eating disorder physician ...
Population genetics is a subfield of genetics that deals with genetic differences within and among populations, and is a part of evolutionary biology. Studies in this branch of biology examine such phenomena as adaptation , speciation , and population structure .