A NATO official, speaking on condition of anonymity, pointed out that after the attacks NATO sent AWACS planes to patrol American skies and deployed a third of the troops in Afghanistan for more than a decade; more than 1,000 soldiers from non-U.S. NATO allies and partners were killed there, the official pointed out.
Cells in the human body have 46 chromosomes, including 22 pairs of autosomes and one pair of sex chromosomes (XX in females, XY in males). Because there are two sets of chromosomes, one from each parent, the cells are considered diploid.
Two chromosomes, or one pair, determine the sex of the organism, so they are called the sex chromosomes. The rest of the chromosomes are referred to as autosomes. For example, humans have 46 chromosomes, or 23 homologous pairs of chromosomes. A karyotype is an image created of all the chromosomes within a nucleus. In a karyotype of a human cell, pairs one to 22 are autosome pairs, while pair 23 consists of the sex chromosomes. The paired autosomes are arranged from one to 22 in descending size. In a normal cell, an autosome pair of chromosomes is usually identical in shape and size and has the same genes at the same location.