TREs have been shown to occur during DNA replication in both in vitro and in vivo studies, allowing for these long tracts of triplet repeats to assemble rapidly in different mechanisms that can result in either small scale or large scale expansions.
TReS have been observed during DNA replication in both laboratory settings and living organisms, enabling these long stretches of triplet repeats to assemble rapidly through various mechanisms that can lead to either small-scale or large-scale expansions.