The X-chromosome is just one of the two sex chromosomes in humans (another will be the Y chromosome) Explanation The X chromosome is among the two sex chromosomes in individuals (one other could be the Y chromosome). The sex chromosomes form one of many 23 sets of real person chromosomes in each mobile. The X-chromosome spans about 155 million DNA foundations (base pairs) and shows approximately 5 % on the overall DNA in cells. Each person usually keeps one couple of sex chromosomes in each cellular. Girls need two X chromosomes, while males have one X and another Y chromosome. At the beginning [...]