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The neutral theory of molecular evolution holds that most evolutionary changes occur at the molecular level, and most of the variation within and between species are due to random genetic drift of mutant alleles that are selectively neutral.
The neutral theory holds that most variation at the molecular level does not affect fitness and, therefore, the evolutionary fate of genetic variation is best explained by stochastic processes.
The neutral theory of molecular evolution suggests that most of the genetic variation in populations is the result of mutation and genetic drift and not selection. According to this theory, if a population carries several different alleles of a particular gene, odds are that each of those alleles is equally good at performing its job — in ...
Neutral Gene Theory is a scientific concept that refers to the assumption that all alleles within a population have the same chances of reproduction and death, regardless of their specific genetic identity.
2 maj 2018 · The neutral theory instead posits a positive thesis about nature: that differences between species are due to neutral substitutions (not adaptive evolution), and that polymorphisms within species are not only neutral but also have dynamics dominated by mutation-drift equilibrium.
1 sty 2007 · The neutral theory was one of the most controversial theories in biology in the late twentieth century. This chapter discusses skepticism of scientists regarding the theory of neutralism, evidence and arguments offered on behalf of the theory, how the test of the theory have been carried out, and what is a drift in context of the neutral theory.
5 lut 2024 · The neutralist/selectionist controversy has structured the field and influences the way molecular evolutionary scientists conceive their research. neutral theory, nearly neutral theory, within-species polymorphism, substitution rate, genome size, GC-biased gene conversion. Associate Editor: Adam Eyre-Walker. Significance.
