The somatic chromosomes of the small Indian mongoose: autoradiographic analysis of an unbalanced translocation heterozygote

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Abstract
The somatic karyotype of the small Indian mongoose (Herpesies auropunctatus Hodgson)was investigated and found to contain 2N = 36 in the female (NF = 68) and 2N = 35 in the male (NF = 66). The female specimen studied was a mosaic (approximately 25%) for an unbalanced translocation, which was ascertained through a large submetacentric marker chromosome. Sex-chromatin determinations revealed approximately 30 % of positive cells to contain two sex-chromatin masses. Autoradiographic analysis identified the X chromosome as a medium-sized metacentric element. However, only one arm of the X was late replicating, and in 30% of the cells both X chromosomes showed late-replication patterns of only one arm. No discernable Y chromosome was evident in male cells.
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