The document discusses chromosomes and their link to cancer. It notes that aneuploidy, which is an abnormal number of chromosomes, is a common genetic change in cancer. Whole chromosomes can become exiled from the nucleus due to errors in cell division. These exiled chromosomes form their own membrane and micronucleus. Cancerous cells are then generated from cells containing these micronuclei. The presence of micronuclei introduces more genetic material and an incorrect number of chromosomes in the cell.