If one of these cells contributes to the genetic makeup of a child, the child will have an extra X chromosome in each of her cells. In some cases, trisomy X occurs during cell division in early embryonic development. Some females with triple X syndrome have an extra X chromosome in only some of their cells. These cases are called 46,XX/47,XXX mosaics.
For other uses, see Taiga (disambiguation). Taiga (/ËtaÉªÉ¡É/; Russian: ÑÐ°Ð¹Ð³Ð°Ì; IPA: [tÉjËÉ¡a]; from Turkic) also known as boreal forest or snow forest, is a biome characterized by coniferous forests consisting mostly of pines, spruces and larches. The taiga is the world's largest biome apart from the oceans.
Taiga. Taiga, also known as boreal forest, is a biome characterized by coniferous forests consisting mostly of pines, spruces and larches.The taiga is the world's largest terrestrial biome.iktionary (1.50 / 2 votes) Rate this definition: taiga (Noun). A subarctic zone of evergreen coniferous forests situated south of the tundras and north of the steppes in the Northern Hemisphere.