xy

Thân thiện

A male's XY chromosome pair determines his typical development.

Definition

1. Noun:
   • (genetics) The normal complement of sex chromosomes in a male mammal: In genetics, 'XY' refers specifically to the pair of sex chromosomes (one X chromosome and one Y chromosome) that typically determines male biological sex in humans and many other species.

Usage Notes

• The term 'XY' is used almost exclusively in scientific, medical, and genetic contexts to denote chromosomal sex.
• It is typically written in italics () or in capital letters without italics (XY) in technical writing.
• It functions as a singular noun when referring to the chromosomal pair as a single genetic condition (e.g., "XY is associated with male development").

Examples of Usage

• Noun:
  • The presence of an XY chromosome pair usually leads to the development of male characteristics.
  • In humans, individuals with XY chromosomes typically produce sperm.
  • The geneticist explained the difference between XX and XY chromosomal patterns.

Advanced Usage

• "XY individual": A person or organism possessing XY chromosomes.

  • The study focused on hormone levels in XY individuals.

• "XY genotype": The specific genetic makeup involving one X and one Y chromosome.

  • The XY genotype triggers the development of testes in utero.

Variants and Related Words

• XX (n): The normal complement of sex chromosomes in a female mammal (two X chromosomes).
• X chromosome (n): One of the two types of sex chromosomes, present in both males and females.
• Y chromosome (n): The sex chromosome typically present only in males and responsible for triggering male sexual development.
• Sex chromosomes (n pl): The pair of chromosomes (X and Y) that determine the biological sex of an organism.

Synonyms

• Male chromosomes (informal/non-technical synonym)
• Heterogametic sex (broader biological term for the sex that produces two different types of gametes; in mammals, the XY male is heterogametic)

Related Phrases

• XY sex-determination system: The biological system where the presence of a Y chromosome determines male development.
  • The XY sex-determination system is common in mammals.

Important Notes

• 'XY' is a scientific term. It is not used in everyday conversation about gender or social roles.
• The reference definition mentions "sex hormones," but this is a slight simplification. 'XY' directly refers to chromosomes, not hormones. The hormones (like testosterone) are produced as a result of the developmental pathway initiated by the genes on these chromosomes.

Học thuật

Noun

1. (genetics) normal complement of sex hormones in a male

Từ đồng nghĩa

• xy