Final answer:
Nonreplicative transposition, characterized as Cut-and-Paste transposition, involves the movement of transposons from one location in the genome to another without replication and is often induced by cellular stress. Autonomous elements may assist non-autonomous transposons in this process.
Step-by-step explanation:
Nonreplicative transposition occurs under the mechanism known as Cut-and-Paste transposition. In this scenario, DNA transposons move from one location in the genome to another without leaving a copy behind at the original site, which contrasts with replicative transposition, where a new copy of the transposon is inserted elsewhere in the genome while retaining the original at its source. Nonreplicative transposition is typically triggered by cellular stress, which activates various DNA mechanisms related to replication, recombination, and repair processes. Additionally, the transposons involved in nonreplicative transposition may be non-autonomous, relying on an actively transposing autonomous element to provide necessary enzymes for mobility.
It is important to note that while nonreplicative transposition involves the physical movement of the transposon, reciprocal translocation, depicted in referenced figures, is a different process where segments of nonhomologous chromosomes are exchanged, and not necessarily related to the activity of transposons.