title: Synapsis of a chromosomal pair heterozygous for a pericentric inversion and the presence of a heterochromatic short arm.
abstract: 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.
authors.affiliation: Department of Biology, Texas A & M University, College Station.
authors.forename: D W
authors.initials: DW
authors.lastname: Hale
authors.forename: I F
authors.initials: IF
authors.lastname: Greenbaum
mesh_terms: 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*
chemical_list: D006570:Heterochromatin