See Also: Divine Providence Health Center Avera Health(health)
Dells Area Health Center Avera Health(health)
Hegg Memorial Health Center Avera Health(health)
X chromosome(dictionary)
chromosome 12(medicine)
chromosome 11(medicine)
chromosome 10(medicine)
sex chromosome(encyclopedia)
chromosome map(medicine)
x chromosome(medicine)

Chromosome, X (health)


The sex chromosome found twice in normal females and once, along with a Y chromosome, in normal males. The complete chromosome complement consisting of 46 chromosomes including the two sex chromosomes is conventionally written as 46,XX for females and 46,XY for males. The X chromosome carries hundreds of genes. Few, if any, of them have anything to do with sex. It is thought that the X and Y chromosomes evolved from an ancient pair of autosomal (nonsex) chromosomes and that the X chromosome retains much of its old autosomal information.