Biology:Polycentric chromosome
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In genetics, a polycentric chromosome is any chromosome featuring multiple centromeres.[1] Polycentric chromosomes are produced by chromosomal aberrations such as deletion, duplication, or translocation.[citation needed] Polycentric chromosomes usually result in the death of the cell because polycentric chromosomes may fail to move to opposite poles of spindle fiber during anaphase. As a result, the chromosome is fragmented, which causes the death of the cell. In some algae, such as Spirogyra, polycentric chromosomes appear normally.[2] They also occur in the sedge, Luzula.[3]
References
- ↑ "Stretching the rules: monocentric chromosomes with multiple centromere domains". PLOS Genetics 8 (6): e1002777. 2012-06-21. doi:10.1371/journal.pgen.1002777. PMID 22737088.
- ↑ "The 'Diffuse' Centromere or Polycentric Chromosomes in Spirogyra". Annals of Botany 18 (2): 143–144. April 1954. doi:10.1093/oxfordjournals.aob.a083387.
- ↑ D. Lewis (1986). "Leonard Francis La Cour 28 July 1907–3 November 1984". Biographical Memoirs of Fellows of the Royal Society 32 (32): 368. doi:10.1098/rsbm.1986.0011.
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