Chromosomes are microscopic, thread-like structures found in the nucleus of every cell, although they only become visible when the cell is dividing. Chromosomes contain all the necessary information for the cell to develop. Human cels normally contain 46 chromosomes, which come in 22 matching pairs, plus a special pair that determines the sex of the individual.
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Chromosomes are microscopic, thread-like structures found in the nucleus of every cell, although they only become visible when the cell is dividing. Chromosomes contain all the necessary information for the cell to develop. Human cels normally contain 46 chromosomes, which come in 22 matching pairs, plus a special pair that determines the sex of the individual.