Appendicitis is swelling of the appendix. Typical symptoms are pain in the abdomen, at the McBurney's point, that gradually worsens over several hours. The most common causes of appendicitis are infection and obstruction,
Super Bowl XXXI. Super Bowl XXXI was an American football game between the American Football Conference (AFC) champion New England Patriots and the National Football Conference (NFC) champion Green Bay Packers to decide the National Football League (NFL) champion for the 1996 season.
XX/XY sex chromosomes. The XX/XY sex-determination system is the most familiar, as it is found in humans. The XX/XY system is found in most other mammals, as well as some insects. In this system, most females have two of the same kind of sex chromosome (XX), while most males have two distinct sex chromosomes (XY). The X and Y sex chromosomes are different in shape and size from each other, unlike the rest of the chromosomes , and are sometimes called allosomes.