X and Y Spermatozoa

Physics

Scientific paper

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Scientific paper

THE methods of fixation and staining human spermatozoa in the past for bright light and electron microscopy result in alterations and coalescence of the head contents into one mass-a very unnatural state. Consequently, as a result of these changes, the nuclear material of the human spermatozoan head has always appeared very uniform and homogeneous in appearance. Io was therefore undesirable to consider the chromatin material in such a state to be normal for the spermatozoan head as it enters the ovum and comes in contact with the egg pro-nucleus. In his ``Developmental Anatomy'' (sixth edition, 1954), L. B. Arey states, ``The interior of the head contains the tightly packed chromosomes of the sperm cell''.

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