Land: 3,537,436 sq. miles (9,161,923 sq km) Water: 181,274 sq. miles (469,497 sq km) Total: 3,718,710 sq. miles (9,631,420 sq km) Land Area: (individual states) Land Area: (all countries) Horizontal Width: 2,680 miles. Vertical Length: 1,582 miles.
This intronless gene encodes a transcription factor that is a member of the high mobility group (HMG)-box family of DNA-binding proteins. This protein is the testis-determining factor (TDF), which initiates male sex determination. Mutations in this gene give rise to XY females with gonadal dysgenesis (Swyer syndrome); translocation of part of the Y chromosome containing this gene to the X chromosome causes XX male syndrome. [provided by RefSeq, Jul 2008]
n an ovary or testis, the site of origin of eggs or spermatozoa. gonad. a sex gland; a gamete-producing gland; the ovary in the female and the testis in the male. The ovary produces the ovum and the testis produces the spermatozoon. In addition, the gonads secrete hormones that influence the development of the reproductive organs and the physical traits that differentiate males from females, such as a crest and body form and size (the secondary sex characters). The hormones produced by the ovary include estrogen and progesterone.