As the prevalence of such a beneficial allele increases, genetic variants that happen to be present on the genomic background (the DNA neighborhood) of the beneficial allele will also become more prevalent.
æz ðə pɹˈɛvələns ʌv sˈʌtʃ ɐ bˌɛnɪfˈɪʃəl ɐlˈiːl ˈɪŋkɹiːsᵻz, dʒɪnˈɛɾɪk vˈɛɹiənts ðæt hˈæpən təbi pɹˈɛzənt ɔnðə dʒɛnˈɑːmɪk bˈækɡɹaʊnd ðə dˌiːˌɛnˈeɪ nˈeɪbɚhˌʊd ʌvðə bˌɛnɪfˈɪʃəl ɐlˈiːl wɪl ˈɔːlsoʊ bɪkˌʌm mˈoːɹ pɹˈɛvələnt.