A: On 12 September 2001, less than 24 hours after the terrorist attacks against the United States, NATO declared the attacks to be an attack against all NATO member countries within the terms of Article 5 of the North Atlantic Treaty.
Humans have an additional pair of sex chromosomes for a total of 46 chromosomes. The sex chromosomes are referred to as X and Y, and their combination determines a personâs sex. Human females have two XX chromosomes while males possess an XY pairing.
Sex chromosomes determine whether you are male or female. An individualâs sex (i.e., whether they are a male or female) is determined by the sex chromosomes. Most people have two sex chromosomes, one that is inherited from their mother and one that is inherited from their father. Typically, females have two X chromosomes (XX) and males have one X chromosome and one Y chromosome (XY).