The term 'Chromosome CARRIER' can be broken down into two words: 'Chromosome' and 'CARRIER'. Chromosomes are structures found in the nucleus of cells that contain genetic material. They are composed of DNA and proteins and are responsible for the transmission of hereditary traits from one generation to the next. A CARRIER is an individual who carries a GENE or genes that can cause a genetic disorder. In this case, a chromosome CARRIER is an individual who carries a GENE or genes on a chromosome that can cause a genetic disorder.