Explain the process of mitosis.

Mitosis is a process that is normally explained in four stages - prophase, metaphase, anaphase and telophase. In prophase, the chromosomes condense and clump together in the middle of the cell. They duplicate, which means you go from having 46 chromosomes to having 92. In metaphase, spindle fibres are sent out from the poles- they're the sides- of the cells. These are basically like ropes which come and stick to the chromosomes, but half the ropes will attach to one set of chromosomes (the original set and the duplicated ones) and the other half will attach to the other set (that's why you need to duplicate the chromosomes in prophase).In anaphase, the spindle fibres contract to drag the two sets of chromosomes to the opposite poles. Your other organelles (your mitochondria, ribosomes etc) have already duplicated- that's in a different stage called interphase, which isn't part of mitosis. Then during the final stage telophase, the cell starts to splits in two and then cytokinesis occurs (cyto- meaning cell), during which the cells fully separate and you're left with two genetically identical cells, both containing 46 chromosomes.