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 ?
Telomeric C-bands were observed mostly in the telomeres of a metacentric chromosome and a submetacentric chromosome.
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.
sativa two different formulas were found in three Tunisian accessions with a metacentric chromosome marker in their chromosome complements.
The mean arm ratios indicated that this species has 16 pairs of clearly metacentric chromosomes (chromosome pairs 1-16; Table 2).
Another metacentric chromosome with terminal bands and interstitial bands on the short arms.
(1964) based on the arm index (metacentric chromosomes, 1.0-1.7; submetacentric, 1.7-3.0; subtelocentric, 3.0-7.0; telocentric, 7.0-[infinity]).
Another metacentric chromosome with a small terminal band and a prominent interstitial band on the short arm.
cracherodii described for this region showed that these species are similar in the metacentric chromosome number equal to eight pairs (8M).
luteus presents exclusively metacentric chromosomes, reinforcing that this last species is not closely related to the species with 2n[male] = 17.
Generally only one form of B chromosome is found, although variants can come in fairly frequently resulting in metacentric chromosomes, subtelocentric chromosomes, and minichromosomes (Jones and Houben, 2003).
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).