centromere
Definition
Noun: * A specialized condensed region of a chromosome: A specific, constricted area on a chromosome that is essential for cell division. It serves as the attachment point for spindle fibers, which separate chromosomes into new cells.
Usage
The term "centromere" is used exclusively in the context of cell biology and genetics to describe a key structural and functional part of a chromosome. * The position of the centromere helps classify chromosomes as metacentric or acrocentric. * During cell division, the spindle fibers attach to the centromere of each chromosome.
Advanced Usage
- Kinetochore: While the centromere is the DNA region, the protein structure that forms on it to attach spindle fibers is called the kinetochore. They are functionally linked.
- The kinetochore assembles at the centromere to facilitate chromosome movement.
- Centromere-specific sequences: Refers to the unique DNA sequences that define the centromere region.
- Researchers are studying centromere-specific sequences to understand their role.
Variants and Related Words
- Centromeric (adjective): Relating to or characteristic of a centromere.
- The centromeric region contains highly repetitive DNA.
Synonyms
- Primary constriction (in cytology): This is a descriptive synonym, referring to the pinched appearance of the centromere under a microscope.
Different Meanings
The word "centromere" has only one specific meaning in biological science. It does not have general or figurative uses.
Noun
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a specialized condensed region of each chromosome that appears during mitosis where the chromatids are held together to form an X shape
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the centromere is difficult to sequence
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