Down Syndrome: Trisomy 21
Down symptoms, also known as trisomy 21, is considered the most common chromosome abnormality in humans and it arises in all races. Approximately you of every 691 babies given birth to in the United States every year is born with this genetic condition. Because people with Down syndrome have got extra copies of genes on chromosome 21, the course of normal development can be disrupted which leads to the distinctive physical characteristics and also other health issues that are associated with this kind of syndrome. With appropriate medical treatment and supportive therapies, people who have Down symptoms can lead happy and rewarding lives.
Down Affliction: Trisomy twenty-one
Typically, every individual is born with 23 pairs of chromosomes, for a total of 46 chromosomes. Upon conception, a fetus begins to develop because it receives twenty-three chromosomes via both the mother's egg and from the father's sperm. In individuals born with Down syndrome (trisomy 21), a mistake occurs during meiosis that triggers an extra chromosome on every cell of their body system. The extra forty seventh chromosome in Down problem is located in the 21st position and it may be either a full or a incomplete extra copy. The exact reason behind errors that result in the extra chromosome in trisomy twenty-one is certainly not well comprehended, however , studies have shown that 95% of trisomy twenty one is mother's in origins. The most significant risk factor that is known to increase the risk of using a child given birth to with Down syndrome is a age of the mother. Down syndrome is a relatively common disease. In fact , it is the most usual chromosome unusualness in Homo sapiens and it happens in all competitions. According to the Centers for Disease Control and Prevention, about 1 of each 691 infants born in the usa each year comes into the world with Straight down syndrome and approximately 95% of those instances are trisomy 21. In total, there are over 400, 1000 people in the usa living with Down syndrome. Because people with Straight down syndrome have extra copies of genetics on chromosome 21, the course of...
Sources: CDC (2011). Facts about Down syndrome. (Online). Retrieved This summer 7 2013. http://www.cdc.gov/ncbddd/birthdefects/DownSyndrome.html
Chen, Harold, MD, MS, FAAP, FACMG, & Buehler, Bruce, MD, Chief Editor (n. g. ). Straight down Syndrome. (Online). Retrieved September 16, 2013. http://emedicine.medscape.com/article/943216-overview#a0101
Fergus, Kathleen, ex - About. com Guide (2009, October). How is Down Syndrome Diagnosed? (Online). Recovered July twenty one, 2013. http://downsyndrome.about.com/od/diagnosingdownsyndrome/a/Diagnosisess.htm
NDSS (n. m. ). Down syndrome info. (Online). Recovered July six, 2013. http://www.ndss.org/Down-Syndrome/Down-Syndrome-Facts/
Pueschel, Sigfried, MARYLAND, PhD, Meters. P. H (n. d). What is Down Syndrome? (Online). Retrieved This summer 7, 2013. http://www.ds-health.com/pueschel.htm