Chromosome mechanisms of sex determination,G- and C-band patterns and nucleolus organizer regions in Tropidurus torquatus (Sauria,Iguanidae) |
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| Authors: | S. Kasahara Y. Yonenaga-Yassuda R. A. Schincariol M. L'Abbate |
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| Affiliation: | 1. Departamento de Biologia, Instituto de Biociências, UNESP, C.P. 178, 13500, Rio Claro, SP, Brasil
2. Departamento de Biologia, Instituto de Biociências, USP, C. P. 11461, 05421, S?o Paulo, SP, Brasil
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| Abstract: | The mitotic and meiotic chromosomes of two groups of the iguanid lizard Tropidurus torquatus were studied after conventional staining, G- and C-banding and silver staining of nucleolar-organizer regions. Karyotypic variations involving the microchromosomes were observed in both groups and are, probably, related to the mechanisms of sex determination of the X1X2Y/X1X1X2X2 type in the one group, and of the XY/XX type in the other. |
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