metacentric chromosome


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Related to metacentric chromosome: holocentric chromosome, submetacentric chromosome

met·a·cen·tric chro·mo·some

a chromosome with a centrally placed centromere that divides the chromosome into two arms of approximately equal length.

met·a·cen·tric chro·mo·some

(met'ă-sen'trik krō'mŏ-sōm)
A chromosome with a centrally placed centromere that divides the chromosome into two arms of approximately equal length.
[meta- + G. kentron, circle]

metacentric chromosome

a chromosome having the CENTROMERE located about halfway along. Compare ACENTRIC CHROMOSOME.
References in periodicals archive ?
3] fluorochrome staining showed interstitial marking on the long arm of the fourth pair of metacentric chromosomes for the 3 species, indicating that this region is rich in GC base pairs (Fig.
C-bands produced by barium hydroxide using propidium iodide were observed in telomeres of the short arms of a large metacentric chromosome (chromosome pair 3) and in the short arms of a submetacentric chromosome (chromosome pair 5).
The few cytogenetically studied species of Pholcidae and other haplogyne families exhibit karyotypic peculiarities, such as predominantly metacentric chromosome morphology and X/XX sex determination chromosome system, that contrasts with those of Entelegynae.
All observed karyotypes were characterized by a large number of small chromosomes and composed of 8 pairs of metacentric chromosomes, common to the populations of Ilheus, Belmonte and Una, plus a variable number of acrocentric chromosomes ranging between 37 and 38 pairs (Fig.
For accessions with 2n=2x=12 chromosomes there is one marker metacentric chromosome pair and six subtelocentric chromosomes.
The ratio of the total length of metacentric chromosomes to that of the submetacentric chromosomes was calculated for both the parent species.
Another metacentric chromosome with terminal bands and interstitial bands on the short arms.
A metacentric chromosome with an interstitial band closer to the centromeric band than the telomeric band on the short arm of the chromosome with very few polymorphisms.
cracherodii described for this region showed that these species are similar in the metacentric chromosome number equal to eight pairs (8M).
This is based on the assumption that Robertsonian fissions of metacentric chromosomes considerably increase haplotype diversity.
A high frequency of metacentric chromosomes was observed in the complements of the 12 accessions, which is indicated by the average values of the centromere indices (CI) and ratios obtained between the arms of the chromosomes (r) (Table 1).
56 [micro]m) and metacentric chromosomes, with the exception of chromosome 2 that is submetacentric.