trisomy
LowFormal, Academic, Medical
Definition
Meaning
A genetic condition where an individual has three copies of a chromosome instead of the usual two.
Trisomy can occur for any chromosome but is most commonly associated with specific syndromes, such as Down syndrome (trisomy 21), Edwards syndrome (trisomy 18), and Patau syndrome (trisomy 13). It often leads to developmental abnormalities and health issues.
Linguistics
Semantic Notes
Trisomy refers specifically to the presence of an extra chromosome; it is distinct from other chromosomal abnormalities like monosomy or polyploidy.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage; both use the term identically in medical contexts.
Connotations
Neutral in both varieties; purely technical.
Frequency
Equally common in medical literature in both UK and US English.
Vocabulary
Collocations
Grammar
Valency Patterns
trisomy of [chromosome number]have trisomydiagnosed with trisomyVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Rarely used; primarily in pharmaceutical or biotech contexts.
Academic
Common in genetics, biology, and medical research papers.
Everyday
Uncommon; mainly used in discussions about health or genetics, e.g., in prenatal testing.
Technical
Frequently used in medical diagnostics, genetic counseling, and scientific literature.
Examples
By Part of Speech
adjective
British English
- The foetus was found to be trisomic for chromosome 21.
American English
- The fetus was diagnosed as trisomic for chromosome 21.
Examples
By CEFR Level
- Trisomy is a word for a genetic problem.
- Doctors can test for trisomy during pregnancy.
- Trisomy 21, also known as Down syndrome, is the most common chromosomal abnormality.
- Advanced maternal age is a known risk factor for autosomal trisomies such as trisomy 21 and trisomy 18.
Learning
Memory Aids
Mnemonic
Remember 'tri-' means three, so trisomy involves three chromosomes instead of two.
Conceptual Metaphor
An extra copy in a genetic blueprint, leading to errors in development.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'трисомния' (a misspelling or unrelated term)
- Ensure accurate translation in medical contexts as 'трисомия'
Common Mistakes
- Mispronouncing as /trɪˈsəʊmi/ or /ˈtrɪsəmi/
- Confusing trisomy with other genetic conditions like monosomy
Practice
Quiz
What does trisomy refer to?
FAQ
Frequently Asked Questions
Trisomy is a genetic condition where there are three copies of a chromosome instead of two.
Common types include trisomy 21 (Down syndrome), trisomy 18 (Edwards syndrome), and trisomy 13 (Patau syndrome).
Trisomy can be diagnosed through prenatal tests like amniocentesis or through genetic testing after birth.
Most trisomies are not inherited but occur randomly during cell division; however, some cases can be due to parental chromosomal rearrangements.