Identification and patterns of synapsis of the autosomally translocated Y-chromosome of the Indian mongoose,Herpestes auropunctatus (Hodgson) |
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Authors: | Rajiva Raman Indrajit Nanda |
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Institution: | (1) Cytogenetics Laboratory, Department of Zoology, Banaras Hindu University, 221005 Varanasi, India |
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Abstract: | The multiple sex chromosome system, X1X2Y /X1X1X2X2 , in the small Indian mongoose, Herpestes auropunctatus, results from a translocation of a part of Y chromosome to an autosome. It is not possible to distinguish the autosome which harbours the Y chromosome element in the somatic complement. By employing the surface-spreading technique to prophase I meiocytes we have identified the region to which the Y chromosome has been translocated as the short arm of chromosome 9 which is a subtelocentric chromosome. This Y chromosome component lacks heterochromatin and no sex vesicle is organised during meiotic prophase. This suggests to us that Y heterochromatin in mammals may be required for the production of a sex vesicle.We take great pleasure in dedicating this paper to our revered teacher Prof. S.P. Ray-Chaudhuri, who initiated us to the field of Cytogenetics, on the occasion of his 75th birth day |
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