Human cells have ____ chromosomes. Our cells divide when we ____ or to ____ old cells or repair damaged tissue. Before a cell divides it must first grow ____ and copy all of its organelles (internal structures) such as mitochondria and ____. After this, each of the 46 chromosomes is ____ but each copy will stay attached to the original chromosome and look like the letter ____. This is stage ____ of the cell cycle and is the ____ part of the cell cycle. Stage 2 is ____. Here the duplicated chromosomes ____ up along the ____ of the cell (a bit like the equator on a globe). They are attached to microscopic ropes called spindles. When these ‘ropes’ or spindles get shorter, the 2 arms of the X shaped chromosome come ____. Each chromosome ‘arm’ or copy moves to ____ sides of the cell. The ____ then divides to finish off mitosis. The final stage of the cell cycle occurs when the ____ divides. This creates ____ new cells that are both ____ to the original cell.

mitosis

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