The Hardy Weinberg principle states that within sufficiently large populations, the allele frequencies remain constant from one generation to the next unless the equilibrium is disturbed by migration, genetic mutations, or selection.
Such gene duplication, followed by divergence from the parent sequence by mutation and selection or drift, is believed to provide a platform for evolutionary change within genomes [ 18].
Growth and morphology are easy-to-follow phenotypic traits of organismal adaptation that may or may not be genetically fixed by mutation and selection.
So just as evolution of species is driven by mutation and selection, cancer evolution is also driven by both oncogenic mutations and alterations in selective pressures, both of which can result from aging and carcinogenic exposures.
They are called "memes," and are treated as evolving, just as genes do, by mutation and selection, with the most successful memes being those that are the most faithfully replicated.
Species evolve by mutation and selection acting on individuals in a population; tumors evolve by mutation and selection acting on cells in a tissue.
The basis for the altered DNA specificities of two Cre recombinase variants, obtained by mutation and selection, was revealed by their cocrystal structures.
In other words, if complex organisms evolve by mutation and selection, there must be a mechanism that makes mutations more likely to produce adaptive phenotypes than predicted by the Fisher's model.
Another way to improve strains is by evolutionary engineering, through which strain robustness is improved by mutation and selection [ 147].
