Spermatogenesis in Sciara coprophila. II. Precocious chromosome orientation in meiosis II.

@article{Abbott1981SpermatogenesisIS,
  title={Spermatogenesis in Sciara coprophila. II. Precocious chromosome orientation in meiosis II.},
  author={Albert G. Abbott and Susan A Gerbi},
  journal={Chromosoma},
  year={1981},
  volume={83 1},
  pages={
          19-27
        }
}
In the second meiotic division of spermatogenesis in Sciara coprophila the X dyad undergoes a directed nondisjunction appearing precociously at one pole. All other chromosomes behave in a normal fashion aligning on the metaphase plate and dividing. Crouse has determined that this directed nondisjunction is governed by a region of the X centromere heterochromatin known to contain the rDNA (Crouse et al., 1977; Crouse, 1979). In order to further characterize this system we have utilized DAPI c… CONTINUE READING
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