These are sequences of dna that can move around to different positions within the genome of a single cell. this process is called transposition. the moving dna sequences can cause mutations.

These sequences are known as jumping genes.

Explanation:Jumping genes or transposons are sequences of DNA that can jump from one chromosome to another or change their position in the same chromosome.This position changes can lead to the turning off a gene or turning on an unnecessary gene due to the mutations caused by these jumping genes.For example, if these genes placed near a gene which activates its transcription.

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey