The pachytene synaptonemal complex complement of the cat |
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Authors: | C B Gillies S K Cowan |
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Institution: | (1) Botany Building A.12, School of Biological Sciences, University of Sydney, 2006 Sydney, N.S.W., Australia |
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Abstract: | Surface spreads of pachytene spermatocyte nuclei from two cats were used to construct a synaptonemal complex karyotype for
the cat. It was possible to recognise the 18 autosomal synaptonemal complexes by reference to a published light microscopic
banded somatic karyotype. Some variation from the somatic karyotype was noted, presumably as a result of differential contraction
during prophase I. The X and Y chromosome axes were joined by a synaptonemal complex in many of the nuclei, but the structure
of the unpaired portion of the X axis was quite variable. In some nuclei it was highly contracted, while in others it was
extended and often was split into two or more axes. In most nuclei the autosomal synaptonemal complexes had numerous axial
twists. |
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Keywords: | |
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