acentric ( ′ā′sentrik ) ( biology ) Not oriented around a middle point. ... Acentric fragment. Chromosome aberration (genetics) Giordano Bruno (history 1450-1789) ...
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metacentric chromosome
a chromosome with the centromere at or near the middle
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...
Acentric fragment A piece of chromosome without a centromere
3' UTR, 3' Untranslated Region The part of the mRNA which lies between the signal for the termination of translation (the stop codon) and the polyA tail.
Acentric
Applied to a chromatid or a chromosome when it lacks a centromere. This condition may arise in an inversion heterozygote as a result of crossing over between a normal and an inverted segment that does not include the centromere.
Metacentric
Applied to a chromosome having its centromere in the middle. See also acrocentric.
Related Terms:
Chromosome
The term was proposed by Waldeyer (1888) for the individual threads within a cell nucleus (gk. chroma, colour; soma, body).
metacentric Chromosome with centromere at or near the middle.
metacercaria Stage between the cercaria and adult in the life cycle of most digenetic trematodes; usually encysted and quiescent.
[edit] Submetacentric
If arms' lengths are unequal, the chromosome is said to be submetacentric
[edit] Acrocentric ...
Metacentric chromosomes have the centromere located at or near the middle of the structure, resulting in two arms of equivalent (or nearly so) length. These chromosomes appear V-shaped when observed during anaphase.
Centromere -- a region of a chromosome to which spindle traction fibers attach during mitosis and meiosis; the position of the centromere determines whether the chromosome is considered an acrocentric, metacentric or telomeric chromosome.
Construction of a Human Genome Library Composed of Multimegabase Acentric Chromosome Fragments
Michael J. Lane, Peter Hahn,(1) and John Hozier(2) ...
The pairs of chromosomes are telocentric, metacentric and acrocentric. Distinguish between the maternally and paternally derived chromosomes by using two different colors. Show one pair of the meiotic chromosomes with a completed cross over.
 See also: Chromosome, Chromosomes, Organ, Protein, Cells
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