chiasmata
A diagram shows chiasmata forming between homologous chromosomes during meiosis.
Definition
- Noun (plural of ):
- Biological structure: In genetics and cell biology, "chiasmata" refer to the X-shaped points of contact between paired chromatids during meiosis, where crossing over and exchange of genetic material occurs.
- General crossing: In anatomy or general usage, a "chiasma" is any intersection or crossing of two structures, such as nerves or tendons.
Usage Examples
- (Biological crossing points for genetic exchange.)
- (Anatomical crossing of nerves.)
Advanced Usage
"Chiasmata formation": the process by which chiasmata develop during meiosis, essential for genetic diversity.
- Chiasmata formation is a key step in ensuring proper chromosome segregation. (The creation of crossing points.)
"Chiasmata frequency": the number or density of chiasmata observed in a given cell or organism.
- Researchers measured chiasmata frequency to study recombination rates. (The count of crossing points.)
Variants and Related Words
Chiasma (n, singular): a single crossing point.
- Each chiasma represents a site of genetic exchange. (One crossing point.)
Chiasmatic (adj): relating to or involving a chiasma.
- Chiasmatic interactions are crucial for genetic recombination. (Pertaining to crossing points.)
Chiasm (n): a less common variant, used interchangeably with chiasma, especially in anatomy.
- The optic chiasm is a well-known structure. (The crossing of optic nerves.)
Synonyms
- Crossing point: a location where two structures intersect.
- Crossover site: in genetics, the specific location of genetic exchange.
Related Idioms
- No common idioms involve "chiasmata" as it is a highly technical term.
Phrasal Verbs
- No phrasal verbs are associated with "chiasmata" due to its specialized scientific usage.