Population of Chittenden County, Vermont: Compare population statistics about Chittenden County, VT by race, age, gender, Latino/Hispanic origin etc. CensusViewer delivers detailed demographics and population statistics from the 2010 Census, 2000 Census, American Community Survey (ACS), registered voter files, commercial data sources and more.
Klinefelter syndrome is the most common sex-chromosome abnormality, affecting about one in every 500 to 700 men. What causes Klinefelter syndrome? The addition of extra chromosomes seems to occur by chance. The syndrome is not inherited from the parents. The addition occurs in the sperm, the egg, or after conception. What are the signs and symptoms of Klinefelter syndrome? Signs and symptoms can vary.
(This is written as XX.) Males have an X and a Y chromosome (written as XY). The two sex chromosomes help a person develop fertility and the sexual characteristics of their gender. Most often, Klinefelter syndrome is the result of one extra X (written as XXY).