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Karyotype analysis ofAscaris lumbricoides var.suum

Male and female pachytene nuclei by 3-D reconstruction from electron microscopy of serial sections

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Abstract

Twelve synaptonemal complexes are present in both oocyte and spermatocyte pachytene nuclei ofAscaris lumbricoides var.suum, as determined by 3-D reconstruction of the nuclear contents from electron microscopy of serial sections and therefore, n=12 in the strain ofAscaris described here. In the female the heterochromatic end of each synaptonemal complex is attached to the nuclear envelope and the other end is free in the nucleoplasm. In the male neither end ot the synaptonemal complex is attached, but there is a heterochromatic knob at one end of each complex. Five additional large heterochromatic masses are present in the spermatocyte nucleus and these may be the sex chromosomes described by earlier workers.

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Authors and Affiliations

  1. Department of Biology, York University, M3J 1P3, Downsview, Ontario, Canada

    Paul Goldstein & Peter B. Moens

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  1. Paul Goldstein
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  2. Peter B. Moens
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Goldstein, P., Moens, P.B. Karyotype analysis ofAscaris lumbricoides var.suum . Chromosoma 58, 101–111 (1976). https://doi.org/10.1007/BF00701353

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  • DOI: https://doi.org/10.1007/BF00701353

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