Final answer:
DNA transposons move through a cut-and-paste or replicative mechanism, while retrotransposons use a reverse transcription mechanism.
Step-by-step explanation:
In DNA transposons, two mechanisms can be observed. The first is the cut-and-paste mechanism, where the transposon is completely removed from one location and transposed to a new site in the DNA. The second mechanism is the replicative mechanism, where the original transposon remains in place while a new copy is inserted elsewhere in the genome.
On the other hand, retrotransposons, which are a type of Class I transposon, use a different mechanism. They move through a mechanism called reverse transcription, where the transposon is transcribed into RNA, then reverse transcribed into cDNA, and finally integrated back into the genome at a different location.