karyotype
C2Technical
Definition
Meaning
The number and visual appearance of the chromosomes in the cell nucleus of an organism.
1. A photomicrograph of chromosomes arranged systematically. 2. The act or process of preparing a chromosome image for analysis. 3. The chromosome complement of an individual or species.
Linguistics
Semantic Notes
The term operates primarily as a noun in its core 'set of chromosomes' meaning. It is also used as a verb meaning 'to determine or analyse the karyotype of'.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or spelling.
Connotations
Identical technical/scientific connotations.
Frequency
Usage frequency is identical and confined to medical/genetic contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
VERB + karyotype: have/perform/analyse/show an abnormal karyotypeADJECTIVE + karyotype: normal/abnormal/standard karyotypekaryotype + NOUN: karyotype analysis/test/reportVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None.”
Usage
Context Usage
Business
Almost never used.
Academic
Common in genetics, biology, and medical research texts.
Everyday
Virtually never used except when discussing specific genetic diagnoses.
Technical
Core term in cytogenetics, clinical genetics, prenatal testing, and oncology.
Examples
By Part of Speech
verb
British English
- The lab will karyotype the amniotic fluid cells to check for abnormalities.
- All patients with suspected leukaemia should have their cells karyotyped.
American English
- The geneticist ordered the cells karyotyped to confirm the diagnosis.
- We need to karyotype the tissue sample before proceeding.
adverb
British English
- The sample was analysed karyotypically.
- They examined the cells karyotypically and molecularly.
American English
- The lab results were reported karyotypically normal.
- The abnormality was only visible karyotypically.
adjective
British English
- The karyotypic analysis revealed a translocation.
- Karyotypic abnormalities are common in this condition.
American English
- The patient had a normal karyotypic profile.
- A karyotypic disorder was suspected.
Examples
By CEFR Level
- Scientists can look at a picture of chromosomes. This picture is called a karyotype.
- A doctor might order a karyotype test if they suspect a genetic problem.
- A normal human karyotype has 46 chromosomes.
- The analysis of the foetal karyotype revealed an extra chromosome 21, indicative of Down syndrome.
- Karyotyping is a standard procedure in prenatal diagnosis.
- Despite the phenotypic presentation suggesting a simple Mendelian disorder, the karyotype unveiled a complex balanced translocation that had gone undetected by earlier sequencing.
- Advanced techniques like spectral karyotyping (SKY) allow for the visualisation of all chromosomes in different colours, enhancing the resolution of traditional karyotype analysis.
Learning
Memory Aids
Mnemonic
Think: 'Carry the type'. Your chromosomes CARRY your genetic TYPE, and a karyotype shows them.
Conceptual Metaphor
A karyotype is a map or a barcode of the genome.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- The Russian term 'кариотип' is a direct cognate, so false friends are not an issue. The trap is overusing it in non-technical contexts.
Common Mistakes
- Pronouncing it 'ka-REE-oh-type'. Correct stress is on the first syllable: 'KAR-ee-oh-type'.
- Using it as a general synonym for 'genetic test'. It refers specifically to chromosome number and structure.
Practice
Quiz
What does a 'karyotype' primarily refer to?
FAQ
Frequently Asked Questions
No. While commonly discussed in human genetics, the karyotype of any species (e.g., mouse, fruit fly) can be described and analysed.
A karyotype is a macroscopic, visual overview of chromosome number, size, and shape. A genome is the complete set of DNA sequences, including all genes and non-coding regions, requiring molecular techniques to 'read'.
Yes. Many genetic diseases, like cystic fibrosis or sickle cell anaemia, are caused by mutations within genes on chromosomes that appear completely normal in a standard karyotype.
Karyotyping is excellent for quickly identifying large-scale chromosomal abnormalities (e.g., aneuploidies, large deletions, translocations) that might be more complex and expensive to detect from raw sequencing data. It provides a cost-effective, visual first screen.