| robertsonian polymorphism, b chromosomes variation and sex chromosomes heteromorphism in the african water rat dasymys (rodentia, muridae). | chromosome banding analysis (g- and c-bands) of dasymys rufulus from senegal, mali and the ivory coast, and d. cf. incomtus from eastern and south-western ethiopia was carried out. the diploid numbers (2n) in the former species range between 36 and 39 due to the presence of 0-3 small biarmed heterochromatic b chromosomes, resulting in a corresponding variation of the number of autosomal arms (nfa) between 44 and 50. the basic autosomal set was, however, constant and identical in these specimens. ... | 2000 | 11196132 |