X chromosome By Ivan Suarez Robles 15 Nov, 2010 One of the two sex chromosomes (the other is the Y chromosome). Males have one X and one Y. Females have two X’s.Related Articles: All About MutationsTrinucleotide Repeat DisordersInduced Pluripotent Stem Cells: The Future of Tissue GenerationGlossary: Y chromosomeRelated Terms:Term: Y chromosomeTerm: chromosomes