Rearrangement of a chromosome in which a segment is moved from one location to another, either within the same chromosome or to another chromosome. This is sometimes reciprocal, when one fragment is exchanged for another.
a condition where a fragment of one chromosome is broken off and is then attached to another. Depending on which piece of chromosome is moved to where, this results in a wide range of medical problems, such as leukemia, breast cancer, schizophrenia or muscular dystrophy.