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.
"[1] Genetic variability in a population promotes biodiversity, as it ensures that no two living things are exactly alike.
Species variability refers to the observable differences within a species, often encompassing morphological, physiological, behavioral, or phenotypic traits.
While genetic variability contributes to species variability, external factors like the environment or developmental conditions can also influence the traits expressed.
There are many sources of genetic variability in a population: There are many sources that decrease genetic variability in a population: