acrocentric adj. Having the centromere located near one end of the chromosome so that one chromosomal arm is long and the other is short
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acrocentric chromosome
a chromosome or chromatid with the centromere near the end
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...
Acrocentric A chromosome with its centromere very close to (but not actually at) one end. It applies to human chromosomes 13, 14, 15, 21 and 22.
Allele One of alternative forms of a gene at a particular locus.
Acrocentric chromosome: A chromosome with its centromere towards one end. Human chromosomes 13,14,15,21,22 are acrocentric.
[edit] Acrocentric
If the p (short) arm is so short that is hard to observe, but still present, then the chromosome is acrocentric (The "acro-" in acrocentric refers to the Greek word for "peak.").
Acrocentric
Applies to a chromosome whose centromere lies very near one end. See also metacentric.
Related Terms:
Chromosome
The term was proposed by Waldeyer (1888) for the individual threads within a cell nucleus (gk. chroma, colour; soma, body).
Acrocentric chromosome
- A chromosome whose centromere is located near one end
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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.
Mouse chromosomes tend to be acrocentric; that is, the centromere connects one long and one very short arm.
Human ribosomal genes are located in NORs (nucleolar organizer regions) on the short arms of acrocentric chromosomes.
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.
A chromosome having its centromere in the middle. See also acrocentric chromosome
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A majority of the chromosomes, however, are acrocentric, with the centromere positioned somewhere between the center and the end of the chromatid to yield an L-shaped structure in the microscope.
 See also: Chromosome, Centromere, Chromosomes, Organ, DNA
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