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Sex chromosomes

Synonym(s)

  • gonosomes

Definition(s)

A chromosome involved in sex determination. [SGD:elh]

Definition from: Gene Ontology via Unified Medical Language SystemThis link leads to a site outside Genetics Home Reference. at the National Library of Medicine

A sex chromosome is a type of chromosome that participates in sex determination. Humans and most other mammals have two sex chromosomes, the X and the Y. Females have two X chromosomes in their cells, while males have both X and a Y chromosomes in their cells. Egg cells all contain an X chromosome, while sperm cells contain an X or Y chromosome. This arrangement means that it is the male that determines the sex of the offspring when fertilization occurs.

Definition from: Talking Glossary of Genetic TermsThis link leads to a site outside Genetics Home Reference. from the National Human Genome Research Institute

The X or Y chromosome in human beings that determines the sex of an individual. Females have two X chromosomes in diploid cells; males have an X and a Y chromosome. The sex chromosomes comprise the 23rd chromosome pair in a karyotype.

Definition from: Human Genome Project InformationThis link leads to a site outside Genetics Home Reference. at the U.S. Department of Energy

Related discussion in the Handbook

See also Understanding Medical Terminology.

 
Published: September 15, 2014