Comparison of phylogeographic structure in the baileyi species group and the codistributed Peromyscus eremicus species group implies two points of codivergence and thus supports two historical vicariance hypotheses proposed for biotas distributed across the peninsular and continental warm deserts: a late Neogene (3 Ma) northern extension of the Sea of Cortéz and a mid-Pleistocene (1 Ma) midpeninsular seaway across Baja California. Department of Ecology and Evolutionary Biology, Biosciences West Building. rudinoris, mtDNA haplotypes are further subdivided into northern and southern lineages along the Baja California Peninsula. Possible evidence for each major condition for evolution by natural selection in rock pocket mice after students see the video and review. Here, we describe the molecular changes underlying adaptive coat color variation in a natural population of rock pocket mice. We consider the western populations to represent a distinct species, C. In this activity, students will investigate a classic study of the evolution of fur color in rock pocket mouse populations, using the short film The Making of the Fittest: Natural Selection and Adaptation. The oldest split separates populations east and west of the Colorado River, a pattern that is congruent with chromosomal and allozyme electrophoretic evidence. This worksheet was modified from the HHMI Activity on color variation in the rock pocket mouse. baileyi revealed three geographically separate mtDNA haplotype lineages. COLRv1 is an evolution of the COLRv0 font format intended to make color fonts widespread on the web. Analysis of phylogeographic structure among 51 individuals from 12 localities throughout the geographic range of C. baileyi represents a highly divergent lineage within the genus, with no closely related extant sister species. Phylogenetic analysis of 699 bp of the mitochondrial DNA (mtDNA) COIII and 450 bp of the cytochrome b genes among 14 species of coarse-haired pocket mice (Heteromyidae: Chaetodipus) corroborated previous indications that genetic divergence between species and species groups within the genus is generally very high, suggesting old times of divergence, and that the nominal species C.
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