The sex of an individual is determined by a pair of sex chromosomes (gonosomes).

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Males “ARE” XY:

Males have two distinct sex chromosomes (XY), and are called the heterogametic sex.

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Females “ARE” XX:

Females have two of the same kind of sex chromosome (XX), and are called the homogametic sex.

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So STOP being an IDIOT and saying you are a girl, or that you are Napoleon, because then “MEANS” you need Psychiatric treatment!