The Navajo Indians are the largest federally recognized Native American Indian tribe in the United States. Their reservation is spread out through out the four corners of Arizona, New Mexico, Utah and Colorado. The Navajo use the name Dine because it refers to a term from the Navajo language that means people.
Males with Klinefelter's syndrome have two X chromosomes (47,XXY), in rare cases three (48,XXXY) or four (49,XXXXY) X-chromosomes. The X-chromosomes carry genes in terms of development of testicles, sex hormone production and physical sex development in general as well as to a certain extent also height growth.
The appearance of signs of Klinefelter syndrome in childhood can vary greatly and range from mild to those that are more obvious. Many of the signs of Klinefelter syndrome also occur in children with other conditions, or children who do not have an underlying diagnosis, which makes detecting Klinefelter syndrome in childhood difficult. Furthermore, many boys show no signs of Klinefelter syndrome during childhood.