sex chromatin: meaning, definition, pronunciation and examples
Very LowTechnical/Scientific
Quick answer
What does “sex chromatin” mean?
A condensed mass of chromatin found in the nucleus of female cells, representing an inactivated X chromosome.
Audio
Pronunciation
Definition
Meaning and Definition
A condensed mass of chromatin found in the nucleus of female cells, representing an inactivated X chromosome.
A cytological marker used to determine genetic sex, visible as a Barr body in cells with more than one X chromosome; used in fields like genetics, pathology, and forensics for sex identification and to diagnose certain chromosomal disorders.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. British texts may use 'nucleus' slightly more frequently than 'cell nucleus', but the term is identical.
Connotations
Purely scientific and clinical, with no cultural or social connotations.
Frequency
Equally rare in both dialects, confined to specialist literature and medical education.
Grammar
How to Use “sex chromatin” in a Sentence
The presence of sex chromatin indicates...Sex chromatin is observed in...A test for sex chromatin was performed.Vocabulary
Collocations
Examples
Examples of “sex chromatin” in a Sentence
adjective
British English
- The sex-chromatin test is a classic cytological method.
- Sex-chromatin-positive cells were identified.
American English
- The sex-chromatin test is a standard cytological method.
- Sex-chromatin-positive cells were identified.
Usage
Meaning in Context
Business
Not used.
Academic
Used in genetics, biology, and medical textbooks and research papers.
Everyday
Never used in everyday conversation.
Technical
Used in cytology reports, genetic diagnostics, forensic pathology, and clinical laboratories.
Vocabulary
Synonyms of “sex chromatin”
Neutral
Weak
Watch out
Common Mistakes When Using “sex chromatin”
- Using 'sex chromatin' to refer to genes or hormones.
- Pronouncing 'chromatin' with a /tʃ/ sound (like 'chrome') instead of /k/ ('krome-uh-tin').
- Misspelling as 'sex chromotin'.
FAQ
Frequently Asked Questions
Typically, no. Normal male cells (XY) have only one X chromosome, which remains active and does not form a visible mass of sex chromatin. It is primarily found in cells with more than one X chromosome (e.g., XX females).
There is no difference; 'Barr body' is a synonym for sex chromatin, named after the scientist Murray Barr who discovered it.
Yes, historically it was used to help diagnose conditions involving sex chromosomes, such as Turner syndrome (XO) or Klinefelter syndrome (XXY), though more advanced genetic tests are now standard.
No, it is a highly specialised term used only in genetics, cytology, and certain medical diagnostics. It is unknown to the general public.
A condensed mass of chromatin found in the nucleus of female cells, representing an inactivated X chromosome.
Sex chromatin is usually technical/scientific in register.
Sex chromatin: in British English it is pronounced /sɛks ˈkrəʊmətɪn/, and in American English it is pronounced /sɛks ˈkroʊmətɪn/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: SEX CHROMATIN = SEE the X (chromosome) as a Clumped mass in the nucleus.
Conceptual Metaphor
THE INACTIVATED X IS A DORMANT LIBRARY (The chromatin is condensed and largely inactive, like books packed away on a shelf).
Practice
Quiz
In which context would the term 'sex chromatin' MOST LIKELY be used?