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Chromosome

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A chromosome is a thread-like structure containing most of the DNA of a living organism. Chromosomes are found within the nuclei of plant and animal cells, and contain most of the genetic information that makes each individual distinct. Humans have two sex chromosomes (X / Y) and 22 pairs of other chromosomes.

The sex chromosomes are the primary genetic factor determining the sex of an individual: a person with two X chromosomes will be genetically female, a person with one X and one Y will be genetically male.

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