pericentric inversion

Also found in: Dictionary, Thesaurus, Legal, Encyclopedia.
Related to pericentric inversion: isochromosome, reciprocal translocation

per·i·cen·tric in·ver·sion

inversion in a chromosome of a single segment that includes the centromere.


1. a turning inward, inside out, or other reversal of the normal relation of a part.
2. a chromosomal aberration due to the inverted reunion of the middle segment after breakage of a chromosome at two points, resulting in a change in sequence of genes or nucleotides.

paracentric inversion
the inverted segment does not include the chromosome's centromere; has exactly the same size and shape as a normal chromosome but will have different banding patterns.
pericentric inversion
an inversion in a chromosome in which the centromere is included in the inverted segment.
teat inversion
the tip is invaginated so that the orifice is closed by the act of sucking. Causes a problem to sucking pigs. Affected sows should be culled.
References in periodicals archive ?
Synaptonemal complexes in a subfertile man with a pericentric inversion in chromosome 21.
Prenatal exclusion of segmental trisomy in familial chromosome 21 pericentric inversion by fluorescence in situ hybridization.
A Down syndrome case with a karyotype of 46,XY,rec(21)dup(21q)inv(21)(p11q22) derived from paternal pericentric inversion of chromosome 21.
Chromosome segregation in an infertile man carrying a unique pericentric inversion, inv(21)(p12q22.
Pericentric inversions of chromosome 9 in Taiwanese fetuses.
Pericentric inversion in human chromosome 1 and the risk for male sterility.
Synaptonemal complex analysis of a pericentric inversion in chromosome 2 of domestic fowl, Gallus domesticus.
Meiotic evidence for pericentric inversion polymorphism in Junco (Aves).
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.