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 continuous biome in the world. This biome is located in the northern part of the Northern Hemisphere and is in North America, Asia, and Europe. It stretches across Alaska, Canada, Scandinavia, and Russia; spreading through the Northern Hemisphere.In North America, there is a type of land called the Canadian Shield.The Canadian Shield has a surface of rock that blocks water from reaching the surface, and makes up a large part of the taiga biome. The taiga has many interesting types of land. Extreme cold in the taiga creates a layer of ground called permafrost.t stretches across Alaska, Canada, Scandinavia, and Russia; spreading through the Northern Hemisphere. In North America, there is a type of land called the Canadian Shield. The Canadian Shield has a surface of rock that blocks water from reaching the surface, and makes up a large part of the taiga biome.