Dividing cells
Once it has copied all its DNA, a cell normally divides into two new cells. This process is called mitosis. Each new cell gets a complete copy of all the DNA, bundled up as 46 chromosomes. Cells that are making egg or sperm cells must divide in a different way. Each egg and sperm cell ends up with only half the amount of DNA present in the original cell, bundled up as 23 chromosomes. This special way of dividing is called meiosis.