Synapsis of a chromosomal pair heterozygous for a pericentric inversion and the presence of a heterochromatic short arm.
Analysis of meiotic pairing configurations in a deer mouse heterozygous for both a pericentric inversion and the presence of a heterochromatic short arm at chromosome 15 revealed straight-paired synaptonemal complexes with equal axial lengths in a majority of the pachytene nuclei. Nonhomologous pairing in this bivalent occurs by direct heterosynapsis of the inverted segments followed by synaptic adjustment of the heterochromatin heteromorphism.
Hale
D W
DW
Department of Biology, Texas A & M University, College Station.
Greenbaum
I F
IF
D000818:Animals; D007446:Chromosome Inversion; D002875:Chromosomes / Q000648:ultrastructure*; D006570:Heterochromatin / Q000032:analysis; D006579:Heterozygote; D007621:Karyotyping; D008297:Male; D008540:Meiosis; D008854:Microscopy, Electron; D010542:Peromyscus / Q000235:genetics*
D006570:Heterochromatin