[The detection of the location in cattle chromosomes of a gene presumably determining testis development]

The localization of the putative testis determining gene (TDF) was established with isotopic and nonisotopic methods of in situ hybridization in prometaphasic chromosomes of cattle. The results of both the methods were seen to coincide. The sites of hybridization have been revealed in X-chromosome (R-bands, q2.1 and q2.3.1). TDF was also localized in the proximal part of the long Y-chromosome arm.