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.
â¢ Triplet expansion repeat mutations can cause fragile X syndrome or Huntington's disease, by modification of gene expression or gain of function, respectively. â¢ Defective genes are often inherited from the parents. In this case, the genetic disorder is known as a hereditary disease.