pericentric inversion


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Related to pericentric inversion: isochromosome, reciprocal translocation

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.
References in periodicals archive ?
ACU 1 + 3 corresponds to AMO 1, 7, 8, and 9 and to NLA 2, 5, 9, 10, 11, 13, and 14, but pericentric inversions are also involved in the differentiation of these chromosomes.
Six cases of partial duplication-deficiency 21 syndrome: 21(dupq22delp23) due to maternal pericentric inversion: inv(21)(p12;q22).
Pericentric inversion of chromosome 9: prevalence in 300 Down syndrome families and molecular studies of nondisjunction.
Trimerotropis pallidipennis is an American grasshopper whose South American populations are polymorphic for pericentric inversions (Mesa 1971, Vaio et al.
It is possible that chromosome 1 harbors an undetected pericentric inversion. If so, this might account for the additional segregation irregularities.
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].
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.
The sex chromosomes consist of three variations of subtelocentric, telocentric, and metacentric types caused by two pericentric inversions and conduct the different sex determining systems (19,20).
severum (Heckel, 1840), which show a smaller number, mainly through robertsonian rearrangements and pericentric inversions (Thompson 1979).
Pericentric inversions are not protected in this manner.