Hello, I am the genetic disease known as Klinefelers Syndrome. I was named after Harry F. Klinefelter who discovered me in 1942. I live only in the bodies of males, and place an extra sex chromosome in their cells. A normal male has 46 chromosomes, which are made up of the 22 autosomal chromosomes and the two sex chromosomes (XY) which can be called 46 XY. A male with my disease would exhibit an abnormal amount of X chromosomes. The mutation that I create is Insertion, where a chromosome is added to the cell. This is caused by the male sperm and the female egg fusing together improperly. My extra X chromosome can come from either the sperm or egg each with an even 50% chance. Most commonly my mutation results in a 47 XXY, where there is only one extra X chromosome. However sometimes I can cause a greater number of two X...