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 taiga is the largest biome. The taiga is primarily a coniferous forest like the temperate rainforest, but the taiga is located between 50 degrees latitude north and the Arctic circle.Many coniferous trees grow in the taiga. The taiga has fewer animal species than the tropical or temperate deciduous forests.he taiga is primarily a coniferous forest like the temperate rainforest, but the taiga is located between 50 degrees latitude north and the Arctic circle. Many coniferous trees grow in the taiga. The taiga has fewer animal species than the tropical or temperate deciduous forests.