A - B - C - D - E - F - G - H - I - K - L - M - N - O - P - Q - R - S - T - U - V - X - Y - Z

X Chromosome - The congenital, developmental, or genetic information in the cell that transmits the information necessary to make a female. All eggs contain one X chromosome, and half of all sperm carry an X chromosome. When two X chromosomes combine, the baby will be a girl.