Skip navigation

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Results 1 - 2 of 2 for Mosaic trisomy 2
  1. What Causes Down Syndrome? From the National Institutes of Health (Eunice Kennedy Shriver National Institute of Child Health and Human Development)  
    Down syndrome is caused by a random error in cell division that results in the presence of an extra copy of chromosome 21. ... Down Syndrome/Related Issues ...
  2. About Down Syndrome From the National Institutes of Health (National Human Genome Research Institute)  
    Down syndrome is a chromosomal condition related to chromosome 21. ... Down Syndrome/Genetics ... Down Syndrome ... National Human Genome Research Institute ... From the ...