Summary
The structure and behavior of XY bivalent in mice is discussed. The view that XY bivalent in pachytene is embedded within the sex vesicle was fully confirmed. X and Y are paired end-to-end by a nonchiasmatic connection, which is established already in pachytene and persists until first meiotic metaphase. The pachytene complement in mice consists of 19 rod-shaped autosomal bivalents and the XY bivalent embedded within the sex vesicle. A satisfactory identification of individual autosomes in male pachytene has not been found possible.
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This paper is dedicated to Professor L. C. Dunn on the occasion of his retirement as Professor from Columbia University in recognition of his deep humanity as a scientist and a man.
Research carried out under a fellowship of the Rockefeller Foundation, and later under fellowship support of the U. S. Department of Health, Education and Welfare through a training grant to the Department of Zoology, Columbia University. The experiments were supported financially by Contract AT/30-1/1804 with the U. S. Atomic Energy Commission.
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Geyer-Duszyńska, I. On the structure of the XY bivalent in Mus musculus L.. Chromosoma 13, 521–525 (1962). https://doi.org/10.1007/BF00321161
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DOI: https://doi.org/10.1007/BF00321161