chromosomal anomaly
Definition
Noun: A chromosomal anomaly is any change in the normal structure or number of chromosomes. Such changes can involve missing, extra, or rearranged pieces of chromosomal material and often result in physical or mental abnormalities.
Usage
The term is used in genetics, medicine, and biology to describe a broad category of genetic conditions originating from chromosomal irregularities. It is a formal, clinical term.
Examples
- The prenatal screening test indicated a possible chromosomal anomaly.
- Down syndrome is one of the most common chromosomal anomalies.
- Researchers are studying the specific chromosomal anomaly linked to the disorder.
Advanced Usage
- "Constitutional chromosomal anomaly": Refers to an anomaly present in all cells of an individual's body, as opposed to one acquired only in certain cells (like in some cancers).
- The term is often used in a diagnostic context, e.g., "The fetus was diagnosed with a severe chromosomal anomaly."
Variants and Related Words
- Chromosomal aberration: A synonym often used interchangeably with "chromosomal anomaly."
- Chromosomal disorder: A condition that is the direct result of a chromosomal anomaly.
- Aneuploidy: A specific type of chromosomal anomaly involving an abnormal number of chromosomes (e.g., trisomy 21).
- Structural chromosomal abnormality: A subtype referring to anomalies in chromosome structure, such as deletions, duplications, or translocations.
Synonyms
- Chromosomal abnormality
- Chromosomal aberration
- Cytogenetic abnormality
Related Phrases
- Genetic disorder: A broader term that includes conditions caused by chromosomal anomalies as well as those caused by mutations in single genes.
- Karyotype abnormality: Refers to an anomaly visible when examining a karyotype (an image of a person's chromosomes).
Noun
-
any change in the normal structure or number of chromosomes; often results in physical or mental abnormalities
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