metacentric


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to metacentric: metacenter, metacentric chromosome

metacentric

 [met″ah-sen´trik]
having the centromere almost at the middle of the replicating chromosome.

met·a·cen·tric

(met'ă-sen'trik),
Having the centromere about equidistant from the extremities, said of a chromosome.
[meta- + G. kentron, circle]

metacentric

/meta·cen·tric/ (-sen´trik) having the centromere near the middle, so that the arms of the replicating chromosome are approximately equal in length.

metacentric

(mĕt′ə-sĕn′trĭk)
adj.
1. Of or relating to a metacenter.
2. Genetics Having the centromere in the median position so that the arms are of equal length. Used of a chromosome.
n.
A metacentric chromosome.

met′a·cen·tric′i·ty (-sĕn-trĭs′ĭ-tē) n.

metacentric

[met′əsen′trik]
Etymology: Gk, meta + kentron, center
pertaining to a chromosome in which the centromere is located near the center so that the arms of the chromosome are of approximately equal length. Compare acrocentric, submetacentric, telocentric.

metacentric

adjective
(1) Referring to a centromere located at a chromosome’s midpoint.
(2) Referring to a chromosome with arms of equal length—i.e., equidistant from a chromosome’s centromere.

metacentric

Of a chromosome in which the CENTROMERE is at or near the centre.

metacentric

a replicating chromosome with the centromere midway between the ends.
References in periodicals archive ?
In comparison to the metacentric pair of the standard karyotype, measurements conducted on the 45 cells with Bs estimated a relative length of 34-52% for the BT form, 32-58% for BST form, and 13-18% for the BM form, and relative lengths for BT, BST and BM were on average 43, 45 and 15%, respectively (Table 2).
The karyotype includes four pairs of metacentric, seven pairs of submetacentric, five pairs of subtelocentric (two of them are distinctly large) and eight pairs of acrocentric autosomes.
Loureiro (1999) obtained the same pattern (NORs in only one chromosome pair) for two Crenicichla species, with NORs located on the short arm of the first metacentric chromosome pair, and for Geophagus brasiliensis, on the short arm of the larger pair of the ST-A group.
All autosomes are acrocentrics except the pairs 1, 5 and 20 that are metacentrics (m).
Chromosomally, the Canidae family is characterized by including species with a large number of acrocentric chromosomes (2n > 64), and others with a small number of metacentric ones (2n < 50) (WAYNE et al.
Both types of Bs seemed to be nonhomologous, the acrocentric type always forming, when in double dose, a chiasmate bivalent that co-oriented along with the autosomes in metaphase I, while both arms of the metacentric B paired and formed a chiasma between their euchromatic ends (White 1951b).
65), all chromosomes of the haploid set were classified as metacentric, their arm ratios ranging from 1.
Both lizards show the same chromosomal morphology, which consists of six pairs of metacentric (M) and submetacentric (SM) macrochromosomes, microchromosome number (#) 7 with acrocentric-telocentric morphology (A-T) and microchromosomes #8 and 9 with M-SM morphology, the rest of microchromosomes are punctiforms.
In particular, the surface of change of transverse metacentric height of the tanker (as basic measure of tanker's stability) is shown (Fig.