chromosome
C1-C2Scientific, technical, academic; occasionally journalistic.
Definition
Meaning
A thread-like structure found in the nucleus of most living cells, carrying genetic information in the form of genes.
The term is used by extension for the genetic material that determines an organism's characteristics and is passed from parent to offspring.
Linguistics
Semantic Notes
The term is concrete when referring to a visible structure (seen under a microscope), but abstract when referring to the information it carries. It is the basic unit of heredity.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Pronunciation differs slightly (see IPA). Spelling is identical.
Connotations
Identical scientific and neutral connotations in both varieties. No notable cultural or evaluative differences.
Frequency
Frequency is equivalent, as the term is almost exclusively used in scientific/educational contexts common to both cultures.
Vocabulary
Collocations
Grammar
Valency Patterns
have + chromosome (e.g., 'Humans have 46 chromosomes.')be located on + chromosome (e.g., 'The gene is located on chromosome 7.')consist of + chromosome (e.g., 'The karyotype consists of stained chromosomes.')Vocabulary
Synonyms
Neutral
Weak
Usage
Context Usage
Business
Virtually unused, except in highly specific biotech/pharma contexts.
Academic
Core term in biology, genetics, medicine, and related life sciences.
Everyday
Used in general discussions about heredity, genetics, health (e.g., Down syndrome), or ancestry/DNA testing.
Technical
Precise term in genetics labs, cytogenetics, medical diagnostics, and evolutionary biology.
Examples
By Part of Speech
adjective
British English
- chromosomal abnormality
- chromosomal analysis
American English
- chromosomal disorder
- chromosomal DNA
Examples
By CEFR Level
- Babies inherit chromosomes from both parents.
- Scientists can look at chromosomes under a microscope.
- The presence of an extra chromosome 21 causes Down syndrome.
- Males have one X and one Y chromosome, while females have two X chromosomes.
- The researcher mapped the gene to a specific locus on the chromosome.
- Chromosomal rearrangements, such as translocations, can have significant phenotypic consequences.
Learning
Memory Aids
Mnemonic
Think of 'CHROME' + 'SOME'. Picture a microscopic, colourful (chrome-like) rod that contains a 'sum' or collection of your genes.
Conceptual Metaphor
A CHROMOSOME IS A CONTAINER (for genes). A CHROMOSOME IS A BLUEPRINT/INSTRUCTION MANUAL (for building an organism).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Direct cognate 'хромосома' is perfectly correct and used identically.
- No significant false friends.
Common Mistakes
- Mispronunciation: confusing stress (stress is on first syllable: CHRO-mo-some).
- Misspelling: 'chromozone' (incorrect).
- Conceptual: Using 'chromosome' and 'gene' interchangeably (a chromosome contains many genes).
Practice
Quiz
What is the primary function of a chromosome?
FAQ
Frequently Asked Questions
A chromosome is a large structure made of DNA and protein, visible under a microscope. A gene is a specific sequence of DNA on a chromosome that codes for a particular trait or function. One chromosome contains hundreds to thousands of genes.
Typically, 46 chromosomes (23 pairs) in most body cells. Sperm and egg cells have 23 single chromosomes each.
Yes, but only during cell division when they condense and become thick enough to be visible through a light microscope. They are usually stained to create a distinctive banding pattern.
They are the pair of chromosomes (X and Y) that determine the biological sex of an individual. Females are XX, males are XY. The other 22 pairs are called autosomes.
Collections
Part of a collection
Scientific Terminology
C1 · 44 words · Precise vocabulary used in scientific disciplines.