Natural selection, genetic drift, and gene flow are the mechanisms that cause changes in allele frequencies over time. When one or more of these forces are acting in a population, the population violates the Hardy-Weinberg assumptions, and evolution occurs.
What processes change allele frequencies?
Allele frequencies in a population may change due to four fundamental forces of evolution: Natural Selection, Genetic Drift, Mutations and Gene Flow.
What are the major factors that can change the gene frequency in a given population?
Factors that disturb the natural equilibrium of gene frequencies include mutation, migration (or gene flow), random genetic drift, and natural selection.
What are the 5 processes that can change the genetic frequency?
There are five key mechanisms that cause a population, a group of interacting organisms of a single species, to exhibit a change in allele frequency from one generation to the next. These are evolution by: mutation, genetic drift, gene flow, non-random mating, and natural selection (previously discussed here).
What are the four processes for evolutionary change?
There are four forces of evolution: mutation, gene flow, genetic drift, and natural selection. Mutation creates new genetic variation in a gene pool.
What are three main causes of evolutionary change?
Three main mechanisms cause allele frequency change: natural selection, genetic drift, and gene flow. Macroevolution, on the other hand, refers to change at or above the level of the species. Advances in technology have given us tools that have dramatically advanced our understanding of how evolution occurs.