| the creeping vole, microtus oregoni: karyotype and sex-chromosome differences between two geographical populations. | the g-banded karyotype of the creeping vole, microtus oregoni, prepared from animals trapped in oregon and washington, is presented. the two populations had similar autosomal banding patterns but exhibited striking differences in their sex chromosomes. the x chromosome of voles captured in oregon was 39% longer than that of voles trapped in washington. the length difference was primarily due to an increase in size of light g-bands, which, in both populations, comprised large segments of the x ch ... | 1988 | 3046846 |