Open AccessThe C-Group Pachytene Bivalent with a Locus Characteristic for Parachromosomally Situated Particulate Bodies (Parameres): A Provisional Map in Human Males
Author(s) -
David A. Hungerford,
F. Ashton,
Gloria Balaban,
Gundula U. LaBadie,
Linda R. Messatzzia,
Gail Haller,
Alice E. Miller
Publication year - 1972
Publication title -
proceedings of the national academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.69.8.2165
Subject(s) - bivalent (engine) , locus (genetics) , meiosis , prophase , chemistry , crystallography , biology , genetics , gene , organic chemistry , metal
During prophase stages of the first meiotic division in human males, an autosomal divalent in the C group (autosomes 6-12) characteristically has associated with it, at a specific locus, small, DNA-containing bodies (parameres). A pachytene chromomere map is presented, as is evidence suggesting that the parameres are disposed in two lateral loops, each of which is coaxial with one of the homologs. Stereophotographs of stacks of plates from electron micrographs of serial ultrathin sections show the parameres in their in situ configuration to be composed of tightly compacted fibrils, 85-90 A in diameter.
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