What number represents the X chromosome in human genetics?

In human genetics, the X chromosome is one of the two sex chromosomes that determine an individual's sex. Humans generally have a total of 23 pairs of chromosomes, which adds up to 46. Out of these pairs, one pair consists of the sex chromosomes: typically two X chromosomes (XX) in females and one X and one Y chromosome (XY) in males. The X chromosome is specifically designated as the 23rd chromosome in this system, which clearly identifies it as the correct choice.

The first 22 pairs are referred to as autosomes, comprising the remaining genetic material that carries most of the hereditary information unrelated to sex. Since the connection between the X chromosome and its position in the total chromosomal count is foundational to understanding human genetics, recognizing it as the 23rd chromosome is essential for comprehending genetic traits that may be linked to sex chromosomes.