2.  A pair of sex cells fail to separate during the formation of an egg or sperm  Embryo ends up with three copies of chromosomes  (XXY)  A recessive trait

3.  Abnormal body proportions  Infertility  Tall height  Gynecomastia

4.  Many have normal lives but some are shortened by a few years  This is not curable but treatable The treatment for this disorder is:  Testosterone therapy which helps › Grow body hair › Appearance of muscles › Concentration › Mood, energy, and strength

5.  The man is most likely unable to have a child and start a family

6.  It may not be diagnosed until puberty  They sometimes go through emotional and depressing times  Men are more vulnerable to other female diseases

7.  http://www.lifespan.org/adam/healthillu stratedencyclopedia/1/000382.html http://www.lifespan.org/adam/healthillu stratedencyclopedia/1/000382.html  http://www.ncbi.nlm.nih.gov/pubmedhe alth/PMH0001420/ http://www.ncbi.nlm.nih.gov/pubmedhe alth/PMH0001420/  http://learn.genetics.utah.edu/content/ disorders/whataregd/klinefelter/ http://learn.genetics.utah.edu/content/ disorders/whataregd/klinefelter/