JUMPING GENE SPREAD. “TEs are found in nearly all organisms and frequently constitute the major portion of the genome. They can be transmitted from one host to another in two ways: through vertical inheritance from parent to offspring, or through horizontal transfer (HT) between non-mating organisms.” (TE = transposable elements, jumping genes).
https://www.sciencedirect.com/science/article/pii/S0959437X17301685