in biology what is transposition?

Answer 1

Transposition generally refers to the removal of a segment of DNA where it is inserted in another site either on the same chromosome or even on a different chromosome.

The segments of DNA that move are called transposons and they have recognition sequences that an enzyme called transposase recognizes to cleave the DNA at those sites, releasing the transposon. The segment then at some point comes into contact with a stretch of DNA containing recognized insertion sites and another enzyme inserts the transposon into the genome.

These are especially prevalent in plants and were discovered by Barbara McClintock who won a Nobel prize for her discovery.

Answer 2

Transposons are sequences of DNA that can move around to different positions within the genome of a single cell, a process called transposition. In the process, they can cause mutations and change the amount of DNA in the genome.