Conservatism in the Arrangement of Genetic Material in Rodents

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Abstract
The Giemsa banding pattern of the karyotype of Neotoma micropus is compared with the banding patterns of seven other rodent species that are progressively more distantly related to N. micropus. Results of comparisons imply that there is a tendency for arrangement of genetic material on chromosomes to be conserved. Results also lend support to systematic inferences based on characters of the glans penis and suggest that the type of approach employed here may be useful in characterizing phylogenetic relationships between genera, tribes, subfamilies, and families of rodents.

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