Rare Diseases

  1. Home
  2. Health
  3. Rare Diseases

Chromosome Disorders

Chromosomes hold the genetic keys to all of the body's functions. There may be errors on any of the body's 23 pairs of chromosomes, such as broken or missing pieces or too many pieces or copies. Links below are grouped by chromosome number (1-22 and sex chromosomes).

Explore Rare Diseases

About.com Special Features

Rare Diseases

  1. Home
  2. Health
  3. Rare Diseases
  4. Information by Disease Type
  5. Chromosome Disorders

©2009 About.com, a part of The New York Times Company.

All rights reserved.