inversion

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Related to Pericentric inversion: isochromosome, reciprocal translocation
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Here, we report a female who carries a unique pericentric inversion ofone chromosome 21: inv (21) (p12; q22).
The differences observed in the cytotype C2 in relation to the cytotype C1 (loss of one element of the metacentric pair No 1, loss of one of the chromosomes of the subtelocentric pair No 4, and appearance of a large metacentric element) could be explained by: a) a fusion of one of the subtelocentrics of the pair No 4 with one of the acrocentric elements of pair No 5 (the largest of the acrocentric series), which would maintain the size relation between those elements and the new large metacentric chromosome (Figure 3); or b) a pericentric inversion of one of the chromosomes of the metacentric pair No 1 causing the displacement of the centromere from a medium to a terminal location, and maintaining the segment that possesses rDNA cluster at the same position (Figure 4).
A case of small cerebral cyst and pericentric inversion of chromosome 9 that developed schizophrenia-like psychosis.
In this current study, only a single pericentric inversion was seen among the autosomal complements of these four species.
The fertility effects of pericentric inversions in Drosophila melanogaster.
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)].
The F5 race is characterized by a fixed fission of chromosome 5 and segregates a very low-frequency pericentric inversion at chromosome 4 (chromosomes 3 and 4 are identical in size and morphology; thus, 4 is designated as the inversion polymorphism simply to standardize with earlier interpretations).
dalmani from National Park "El Palmar" were polymorphic for a pericentric inversion in the [M.
Diakinetic nuclei were examined for the frequency of chiasmata (bivalent/trivalent formation) and for frequency and incidence of crossing over within the inverted region of pericentric inversion heterozygotes.
For example, heterozygosity for the centric fission of four chromosomes (1, 3, 4, and 6) and pericentric inversion of chromosome 4 resulted in no significant meiotic problems.