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.
What is Fragile-X Syndrome? Fragile-X Syndrome: A rare inherited characterized by various physical anomalies as well as mental retardation. The symptoms are milder in females. Fragile-X Syndrome: An inherited disease characterized by the presence of a fragile site in the long arm of chromosome X. It is a common cause of mental retardation, second only in frequency to the Down syndrome (trisomy 21).