Trisomy

A trisomy is a type of polysomy in which there are three instances of a particular chromosome, instead of the normal two. A trisomy is a type of aneuploidy (an abnormal number of chromosomes).

Read more about TrisomyDescription and Causes, Human Trisomy

Other articles related to "trisomy":

Sequenom - MaterniT21 PLUS
... PLUS is Sequenom Center for Molecular Medicine's prenatal test for trisomy 21 Down syndrome, trisomy 18 (Edwards syndrome) and trisomy 13 (Patau syndrome). 21, 18, or 13 can indicate whether the fetus has trisomy in that chromosome ...
Genetic Origins Of Down Syndrome - Mosaicism
... is when some of the cells in the body are normal and some cells have trisomy 21, an arrangement called a mosaic (46,XX/47,XX,+21) ... during an early cell division leads to a fraction of the cells with trisomy 21 or a Down syndrome embryo undergoes nondisjunction and some of the cells in the embryo revert back to the normal ... considerable variability in the fraction of trisomy 21, both as a whole and tissue-by-tissue ...
Sequenom
... such as MaterniT21 PLUS, a noninvasive prenatal test for trisomy 21, trisomy 18, and trisomy 13, RetnaGene AMD a genetic test for risk of progression for age-related macular degeneration, Heredi-T Cystic Fibrosis ...
Trisomy 16
... Trisomy 16 is a chromosomal abnormality in which there are 3 copies of chromosome 16 rather than two ... It is the most common trisomy leading to miscarriage and the second most common chromosomal cause of it, closely following X-chromosome monosomy ... Like most chromosomal abnormalities, trisomy 16 usually causes miscarriage in the first trimester of pregnancy ...