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.
In males the sex. chromosomes are different: one is called X and one is called Y, so male chromosomes. are usually described as 46,XY. Females usually have two X chromosomes and are. described as 46,XX. Females with triple X syndrome have an extra X chromosome, so. three in all.