LP18339-9
Barr bodies
Active
Description
A Barr body is the inactive X chromosome in a female somatic cell, or the inactive Z in a male, rendered inactive in a process called lyonization, in those species (including humans) in which sex is determined by the presence of the Y or W chromosome rather than the diploidy of the X or Z. The Lyon hypothesis states that in cells with multiple X chromosomes, all but one are inactivated during mammalian embryogenesis. This happens early in embryonic development at random in mammals, except in marsupials and in some extra-embryonic tissues of some placental mammals, in which the father's X chromosome is always deactivated. Barr bodies are named after their discoverer, Murray Barr. In men and women with more than one X chromosome, the number of Barr bodies visible at interphase is always one less than the total number of X chromosomes. For example, men with a 47,XXY karyotype have a single Barr body, whereas women with a 47,XXX karyotype have two Barr bodies. Barr bodies can be seen on the nucleus of neutrophils. Copyright Text is available under the Creative Commons Attribution/Share-Alike License. See http://creativecommons.org/licenses/by-sa/3.0/ for details. Source: Wikipedia , Wikipedia
Basic Part Properties
- Part Name
- Barr bodies
- Part Display Name
- Barr bodies
- Part Type
- Component (Describes the core component or analyte measured)
- Created On
- 2000-05-04
- Construct for LOINC Short Name
- Barr Bod
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- CodeSystem lookup
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Language Variants Get Info
| Tag | Language | Translation |
|---|---|---|
| zh-CN | Chinese (China) | Barr 氏小体 Synonyms: Barr 小体; |
| es-ES | Spanish (Spain) | Cuerpos de Barr |
| it-IT | Italian (Italy) | Barr, corpi Synonyms: Corpi di Barr |
| tr-TR | Turkish (Turkey) | Barr cisimleri |
| ru-RU | Russian (Russian Federation) | Барра тельце Synonyms: Тельце Барра |
| fr-BE | French (Belgium) | Corps de Barr |
| fr-CA | French (Canada) | Corps de Barr |
| nl-NL | Dutch (Netherlands) | lichaampjes van Barr |
| el-GR | Greek (Greece) | Σωμάτια Barr Synonyms: Σωμάτια Barr |
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