Linked from
The 17 pages that link to Genetic variation, each with the reason it gives.
EvolutionRelated: Without heritable variation, selection cannot produce a lasting genetic response.
GenomicsRelated: Variation is a major target of genomic measurement and interpretation.
BuddingRelated: Budding tends to preserve parental genotypes, while mutations introduce differences.
Clonal evolutionRelated: Heritable differences provide the raw material for divergent cell lineages.
MicroevolutionRelated: Microevolution changes the amount and distribution of genetic variation.