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• 09:43, 17 March 2025 Robinr78 talk contribs created page X chromosome (Created page with "{{header|X chromosome 04/25}} {{sexlist}} <br> The '''X chromosome'' is one of the two sex chromosomes found in many organisms, including mammals. It is present in both males and females and is part of the XY and XO sex-determination systems. Early researchers named the X chromosome for its unique properties, which also led to naming its counterpart, the Y chromosome, after the following letter in the alphabet, following its later discovery. == Discovery == In 1890, Herm...")