XYY syndrome

noun

An aneuploidy of the sex chromosomes in which a human male receives an extra Y chromosome, giving a total of 47 chromosomes instead of the usual 46; the condition is associated with learning difficulties and above-average height.

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Meanings

nounXYY syndrome (uncountable)
  1. uncountableAn aneuploidy of the sex chromosomes in which a human male receives an extra Y chromosome, giving a total of 47 chromosomes instead of the usual 46; the condition is associated with learning difficulties and above-average height.

Synonyms & antonyms

Also see
jacobs syndrome
Cite this entry
APA

XYY syndrome. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/XYY%20syndrome

MLA

“XYY syndrome.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/XYY%20syndrome. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “XYY syndrome,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/XYY%20syndrome.

Source: XYY syndrome on Wiktionary, CC BY-SA 4.0.