Definition

1. Noun:
   • (Genetics): An abnormal chromosomal complement in a male, characterized by the presence of an extra Y chromosome, resulting in a 47,XYY karyotype.

Usage

• The term "xyy" is used specifically in the fields of genetics, medicine, and biology to describe a chromosomal condition.
• It functions as a noun, often preceded by articles like "an" or "the," or used attributively (e.g., XYY syndrome).
• Example:

Examples

• As a subject:
  • Xyy is a chromosomal anomaly that occurs in a small percentage of the male population.
• As an object:
  • The test confirmed the presence of xyy in the fetus's cells.
• Attributive use:
  • Researchers are studying the developmental outcomes of xyy individuals.

Advanced Usage

• "XYY syndrome": The clinical condition associated with the 47,XYY karyotype.
  • The pediatrician discussed the potential characteristics of XYY syndrome with the parents.
• "47,XYY": The formal scientific notation for the karyotype.
  • The lab report listed the chromosomal finding as 47,XYY.

Variants and Related Words

• 47,XYY karyotype (n): The formal genetic description.
• XYY syndrome (n): The medical condition associated with the chromosomal complement.

Synonyms

• 47,XYY: (The precise scientific synonym)
• Double Y syndrome: (An informal, less common term)

Notes on Meaning

• The term "xyy" refers strictly to a genetic constitution. It is not a term for a disease or illness, but rather a description of a chromosomal variation.
• It is distinct from other sex chromosome aneuploidies like XXY (Klinefelter syndrome) or XXX.

Noun

1. (genetics) abnormal complement of sex hormones in a male who has two Y chromosomes