Genetic variability

Genetic variability is either the presence of, or the generation of, genetic differences. It is defined as "the formation of individuals differing in genotype, or the presence of genotypically different individuals, in contrast to environmentally induced differences which, as a rule, cause only temporary, nonheritable changes of the phenotype". Genetic variability in a population is important for biodiversity, as it ensures that no two living things are exactly alike. While there are many sources that can cause genetic variability, there are also factors that can decrease genetic variability.