tˈuː pɹˈoʊbz mˈʌst biː jˈuːzd fɔːɹ ˈiːtʃ ˌɛsˌɛnpˈiː pəzˈɪʃən tə dɪtˈɛkt bˈoʊθ ɐlˈiːlz; ɪf ˈoʊnli wˈʌn pɹˈoʊb wɜː jˈuːzd, ɛkspˌɛɹɪmˈɛntəl fˈeɪlɪɹ wʊd biː ˌɪndɪstˈɪŋɡwɪʃəbəl fɹʌm hˌɑːməzɪɡˈɔsᵻɾi ʌvðə nˈɑːnpɹˈoʊbd ɐlˈiːl.
Two probes must be used for each SNP position to detect both alleles; if only one probe were used, experimental failure would be indistinguishable from homozygosity of the non-probed allele.