XX or xx may refer to:

Film and TV

Genetics

  • XX sex chromosomes, in the XY sex-determination system
  • XX sex chromosomes, in the XO sex-determination system
    • a female, an organism producing ova gametes that fuse with the male gamete during sexual reproduction, typically having two X chromosomes
    • XX male syndrome, also known as de la Chapelle syndrome, a rare congenital intersex condition resulting in a phenotypical male with two X chromosomes
    • XX gonadal dysgenesis, a type of female hypogonadism resulting in non-functioning ovaries

Music

Albums

Songs

Organisations

Other uses

  • XX (novel), a 2020 novel by Rian Hughes
  • XX System or Double-Cross System, a British deception operation in the Second World War
  • Les XX, a group of twenty Belgian painters
  • Dos Equis or XX, a brand of Mexican beer
  • xx, to express exponentiation in the initial version of the FORTRAN programming language

See also

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