Prairie. Prairies are ecosystems considered part of the temperate grasslands, savannas, and shrublands biome by ecologists, based on similar temperate climates, moderate rainfall, and a composition of grasses, herbs, and shrubs, rather than trees, as the dominant vegetation type.
Triple X Syndrome (47,XXX) Triple X Syndrome is a genetic disorder that alters the sex chromosomes. The X chromosome, along with the Y chromosome, determine the sex of an individual. Most males have only one X chromosome and one Y chromosome, while most females have two X chromosomes.
Males have only one X chromosome, which is inherited from the mother at conception, and they receive a Y chromosome from the father. Females inherit two X chromosomes, one from each parent. Fragile X syndrome is caused by a mutation in a gene called FMR-1.This gene is located on the X chromosome.The FMR-1 gene is thought to play an important role in the development of the brain, but the exact way that the gene acts in the body is not fully understood.ragile X syndrome is the most common form of inherited mental retardation. Individuals with this condition have developmental delay, variable levels of mental retardation, and behavioral and emotional difficulties.