AMPHIASTER Meaning and
Definition
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Amphiaster refers to a structure that is commonly formed during cell division, specifically in the mitotic phase of the cell cycle. It characteristically consists of two asters, which are star-shaped assemblies of microtubules originating from the centrosomes located at each pole of a dividing cell. The amphiaster is also referred to as a bipolar spindle, as it constitutes the apparatus responsible for the separation and subsequent allocation of chromosomes to two daughter cells.
During mitosis, the microtubules of the amphiaster extend from the centrosomes, meeting at the equatorial region called the metaphase plate. At this stage, the replicated chromosomes align along the plate, preparing for their segregation. The microtubules of the amphiaster interact with protein fibers known as kinetochores located at the centromeres of the chromosomes, allowing for their attachment and movement.
As the cell progresses into anaphase, the amphiaster undergoes significant changes. The microtubules shorten and contract, leading to the pulling apart of the duplicated chromosomes towards opposite poles of the cell. Finally, during telophase, the amphiaster disassembles, and two separate nuclei form around the sets of chromosomes, ultimately giving rise to two genetically identical daughter cells.
In conclusion, amphiaster is a crucial structure that ensures the accurate division and distribution of genetic material during cell division, playing a vital role in the maintenance and continuity of life.
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The double star, a figure formed of the chromatin of the nucleus during mitosis.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for AMPHIASTER
- zmphiaster
- smphiaster
- wmphiaster
- qmphiaster
- anphiaster
- akphiaster
- ajphiaster
- amohiaster
- amlhiaster
- am-hiaster
- am0hiaster
- ampgiaster
- ampbiaster
- ampniaster
- ampjiaster
- ampuiaster
- ampyiaster
- amphuaster
- amphjaster
Etymology of AMPHIASTER
The word "Amphiaster" is derived from two Greek roots: "amphi", meaning "both" or "on both sides", and "aster", meaning "star". The combination of these roots refers to a structure or organism that has two star-like formations or structures.
Similar spelling word for AMPHIASTER
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