Coincidence of Modified Crossover Distribution with Modified Synaptonemal Complexes

  • Peter B. Moens


In eukaryotes the systematic nonoccurrence of reciprocal exchange in competent chromosomes is not predictable from molecular models of conversion or exchange. Modifications of crossover distribution include positive interference, species-specific limitations of crossovers per cell or per bivalent, the localization of crossovers in specific chromsosome segments, and the abolishment of crossovers in meiocytes of one or the other sex of members of one species. In each case the particular regulation of recombination represents an adaptation in the evolutionary strategy of the species. Unlike the process of recombination itself, these adaptations are often of recent origin, and differences occur between the species of a single genus or family.


Nuclear Envelope Synaptonemal Complex Meiotic Prophase Lateral Element Terminal Segment 
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Copyright information

© Plenum Press, New York 1974

Authors and Affiliations

  • Peter B. Moens
    • 1
  1. 1.York UniversityDownsviewCanada

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