Diseases & Conditions, Chromosome Disorders. You will find articles, informations, research, the latest medical advances, ... about this disease and the parts of the body it may affect. This is the first page of 7loop.com Guide to Appendix Cancer. To see other pages, use the menu. Think of that menu as a roadmap to this full guide. Chromosome Disorders from 7loop.com aims to provide you with a mixture of the most important Chromosome Disorders resources that we publish with the latest, continually updated research articles from The 7loop.com and all of our specialist journals, plus online education from 7loop.com Learning. A chromosome abnormality, disorder, anomaly, aberration, or mutation is a missing, extra, or irregular portion of chromosomal DNA. It can be from an atypical number of chromosomes or a structural abnormality in one or more chromosomes. Chromosome mutation was formerly used in a strict sense to mean a change in a chromosomal segment, involving more than one gene. The term "karyotype" refers to the full set of chromosomes from an individual; this can be compared to a "normal" karyotype for the species via genetic testing. A chromosome anomaly may be detected or confirmed in this manner. Chromosome anomalies usually occur when there is an error in cell division following meiosis or mitosis. There are many types of chromosome anomalies. They can be organized into two basic groups, numerical and structural anomalies. YOUR HEALTH IS NOT A MOVIE. All information and content on this site are for information and educational purposes only. The information should not be used for either diagnosis or treatment or both for any health related problem or disease. Always seek the advice of a qualified physician for medical diagnosis and treatment.