The City of Carmel has been recognized with numerous awards and ratings for its programs and services. Carmel ranked #1 Best Place to Live in America by CNN Money Magazine in 2012 for cities with a population between 50,000 and 300,000.
Typically, the nucleus of each cell contains 23 pairs of chromosomes, half of which are inherited from each parent. Down syndrome occurs when an individual has a full or partial extra copy of chromosome 21. (http://www.ndss.org/Down-Syndrome/What-Is-Down-Syndrome/)
Research shows that three types of chromosomal changes can lead to Down syndrome. 1  Complete trisomy 21. 2  In this case, an error during the formation of the egg or the sperm results in either one having an extra chromosome. 3  So after the egg and sperm unite, the resulting cells will also have three copies of chromosome 21. The complete extra copy of chromosome 21 is in all of the person's cellsâor a complete trisomy. Complete trisomy 21 is the cause of about 95% of Down syndrome cases. Mosaic trisomy 21.