Nonhomologous associations of C-heterochromatin at human male meitoic prophase.
In human male meiotic prophase, nonhomologous pairings and connections between C-heterochromatic regions were demonstrated by C-banding and G-11 staining. Approximately 40% of the pachytene stages exhibited bivalent associations at regions of C-heterochromatin. Nonhomologous associations were seen between all possible morphological types of bivalents. Evidence is submitted suggesting that nonhomologous associations between regions of C-heterochromatin are a fairly common event in many organisms, including man, and the possible roles of this phenomenon in meiosis are discussed.
D001399:Azure Stains; D002871:Chromosome Banding; D006570:Heterochromatin / Q000648:ultrastructure*; D006801:Humans; D008297:Male; D008540:Meiosis; D008938:Mitosis; D013737:Testis / Q000648:ultrastructure
D001399:Azure Stains; D006570:Heterochromatin