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.
22 and 1/2 chromosomes are common to both males and female. The one that contains the X and Y chromosomes makes the difference. If you have X and Y chromosomes, you are male. If you have two X chromosomes, you are female. So both the male and female have got that one X chromosome in common.