pericentric inversion

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pericentric inversion

[‚per·ə′sen·trik in′vər·zhən]
(genetics)
An aberration resulting from a break in each arm of a chromosome and rejoining with the middle fragment containing the centromere now inverted with respect to the two terminal fragments.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Akodon cursor (ACU) presents variation in diploid numbers (2n = 14 to 16) due to a complex rearrangement involving chromosomes 1 and 3, in which pericentric inversions followed by a centric fusion gave rise to a karyotype with 2n = 15 when in heterozygosis or 2n = 14 when in homozygosis [6,8].
Different from pericentric inversions, centric fusions or Robertsonian rearrangements are usually reported in nonPerciformes marine fish, such as flatfish (Pleuronectiformes) [28], toadfish (Batrachoidiformes) [29], and some mullets (Mugiliformes) [30].
Pericentric inversions. Problems and significance for clinical genetics.
Cytogenetic findings in 250 schizophrenics: evidence confirming an excess of the X chromosome aneuploidies and pericentric inversion of chromosome 9.
For all of those chromosomes that were different (4, 7, 9, 11, and 18), pericentric inversions can be proposed to be the evolutionary force differentiating the two species.
Evidence for two successive pericentric inversions in sex lampbrush chromosomes of Rana rugosa (Anura: Ranidae).
Existent variability might be due to the acquisition or loss of small chromosome fragments, to non-reciprocal translocations, to pericentric inversions, and to tandem duplications or differential crossing-overs (Uribe-Alcocer et al.
The fertility effects of pericentric inversions in Drosophila melanogaster.
Yet for all, the karyotype composed entirely of bibrachial chromosomes constitutes a derived condition, apparently originated by pericentric inversions and heterochromatinization processes in some pairs.
White (1949) and Coleman (1948) found that within-Urthoptera pericentric inversions were mainly observed in three genera, Trimerotropis, Circotettix and Aerochoreutes (band-winged grasshoppers, Oedipodinae), referring to them as "trimerotropines" to reflect their relatedness [Aerochoreutes was later removed from synonymy to Circotettix (Utte 1984)].
Heterosynapsis and suppression of chiasmata within heterozygous pericentric inversions of the Sitka deer mouse.
The Moreton and Torresian taxa differ by fixed pericentric inversions at 7 of 12 chromosomal pairs.