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How many chromosomes do humans have?

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Quick Answer

Humans have 23 pairs of chromosomes, giving each cell a total of 46. This includes 22 pairs of autosomes and one pair of sex chromosomes.

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Full Answer

According to the National Human Genome Research Institute, chromosomes are arranged in pairs inside the nucleus of each cell. Almost all of the cells in the body have a full set of chromosomes, with the exception of reproductive cells, or gametes, which carry only half a set. When two gametes cells unite during reproduction, a complete set of paired chromosomes is formed in the new cell, with half inherited from the mother and half from the father.

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