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A chromosome is the collected structure of DNA and protein that is present in every cell of the human body. They carry DNA and genes and control the way the human body grows and develops, such as characteristics, certain types of behavior, and appearance. A human has 23 pairs of chromosomes in every cell, all of which duplicate when the cell that they are contained in divides. Gametes are the only exception, having half the number of chromosomes other cells have to enable them to fuse with the chromosomes from the other type of gametes and produce a new human.

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16y ago

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