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.
The tundra is a biome that is adjacent to the taiga. In North America, the tundra is hovering right above the taiga biome. This contributes to the fact that the taiga and tundra biomes share similar characteristics and similar species of plants and animals.he name Taiga comes from the Russian word meaning forest.. The Taiga is the world's largest terrestrial biome. It covers most of Canada, Alaska, and the continental United States.