Down Syndrome (Tri-21)
What is Down Syndrome?
It is not considered a mutation because, in the meiotic division the chromosome fails to separate in the sperm or egg causing it to have three instead of two.
How do you get the disorder?
Can/how is it treated?
How is it diagnosed?
“Down syndrome can be diagnosed in infancy based on the characteristic clinical findings. When Down syndrome is suspected in a person, a genetic test called a chromosome analysis is performed on a blood or skin sample to look for an extra chromosome 21 (trisomy 21). Trisomy 21 means that each cell in the body has three copies of chromosome 21 instead of the usual two copies.”
What I discovered..
citations and references
Crosta, Peter. "Down Syndrome: Facts, Symptoms and Characteristics." Medical News Today. MediLexicon, Intl., 22 Apr. 2016. Web.
22 Apr. 2016. http://www.medicalnewstoday.com/articles/145554.php
Bull, M. J., & the Committee on Genetics. (2011). Health supervision for children with Down syndrome. Pediatrics, 128, 393–406 22 Apr. 2016. Web.
National Human Genome Research Institute. (2010). Learning about Down syndrome. Retrieved June 11, 2012, from http://www.genome.gov/19517824#3