Transposons are specific DNA sequences that move within and between chromosomes, alter the expression of neighboring genes especially if the transposon is a regulator gene, and have been discovered in corn, fruit flies, bacteria, and humans. Which of the following statements is correct?
1) Transposons are specific DNA sequences that move within and between chromosomes.
2) Transposons alter the expression of neighboring genes especially if the transposon is a regulator gene.
3) Transposons have been discovered in corn, fruit flies, bacteria, and humans.
4) All of the choices are correct.