Follow Healthline   |   Healthline on TwitterTwitter   |   Healthline on FacebookFacebook
Symptom Search   |   Treatment Search   |   Doctor Search   |   Drug Search

Mental Retardation: Image

Advertisement
Marketplace

  An accident or mutation in genetic developme...


An accident or mutation in genetic development may cause retardation. An example of such a mutation is the development of an extra chromosome 21 that causes Down syndrome. Shown here is a chart (karyotype) showing the 22 chromosome pairs, and in pair 21, three chromosomes (instead of two) are shown. (Phototake/NYC. Reproduced by permission.) See color insert for color version of photo.
This image found in these articles:
  1. Mental retardation
Advertisement
Back to Top