Abstract
On the chromosomes of the rooster the constitutive heterochromatin (C-bands) is to be found for the most part at the centromeres. The position of the centric heterochromatin in spermatids and sperm is not randomly distributed. In early, round spermatids one heterochromatic block lies at this exact position on the membrane that develops into the tip of the sperm nucleus (acrosomal chromocenter). During the elongation of the spermatid nucleus another heterochromatic block comes to lie on the basal nuclear membrane. The other centromeres arrange themselves tandem-wise between the acrosomal and the basal chromocenters. Comparisons have been made between this specific arrangement and the location of chromosomes in the sperm of amphibians and mammalians.
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Dressler, B., Schmid, M. Specific arrangement of chromosomes in the spermiogenesis of Gallus domesticus . Chromosoma 58, 387–391 (1976). https://doi.org/10.1007/BF00292846
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DOI: https://doi.org/10.1007/BF00292846