Search results
Results From The WOW.Com Content Network
Balancing selection refers to a number of selective processes by which multiple alleles (different versions of a gene) are actively maintained in the gene pool of a population at frequencies larger than expected from genetic drift alone. Balancing selection is rare compared to purifying selection. [1]
The incidental purging of non-deleterious alleles due to such spatial proximity to deleterious alleles is called background selection. [4] This effect increases with lower mutation rate but decreases with higher recombination rate. [5] Purifying selection can be split into purging by non-random mating (assortative mating) and purging by genetic ...
The K a /K s ratio is used to infer the direction and magnitude of natural selection acting on protein coding genes. A ratio greater than 1 implies positive or Darwinian selection (driving change); less than 1 implies purifying or stabilizing selection (acting against change); and a ratio of exactly 1 indicates neutral (i.e. no) selection.
In negative frequency-dependent selection, the fitness of a phenotype or genotype decreases as it becomes more common. This is an example of balancing selection. More generally, frequency-dependent selection includes when biological interactions make an individual's fitness depend on the frequencies of other phenotypes or genotypes in the ...
The final four-team College Football Playoff is poised to be the most controversial yet. No. 8 Alabama was the agent of chaos Saturday, upsetting No. 1 Georgia for the Southeastern Conference ...
Georgia football vs. Alabama prediction. Georgia 31, Alabama 24. Georgia allowed just three teams to hit 20 points against them in the regular season last year. Six have done it this season, but ...
For premium support please call: 800-290-4726 more ways to reach us
Purifying or negative selection acts to remove genetic variation from the population (and is opposed by de novo mutation, which introduces new variation. [76] [77] In contrast, balancing selection acts to maintain genetic variation in a population, even in the absence of de novo mutation, by negative frequency-dependent selection.