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 biome is sometimes called a coniferous forest. This is because it is home to many coniferous trees such as pine, spruce, fir, and hemlock. Taiga biomes are found bet â¦ ween 50 and 60 degrees north latitudes. The taiga is the largest land biome on Earth, covering over 15 percent of the Earth's land.his is because it is home to many coniferous trees such as pine, spruce, fir, and hemlock. Taiga biomes are found bet â¦ ween 50 and 60 degrees north latitudes. The taiga is the largest land biome on Earth, covering over 15 percent of the Earth's land.