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) , toadfish (Batrachoidiformes) , and some mullets (Mugiliformes) .
. 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.