title: Determination of the primitive karyotype for Peromyscus.
mesh_terms: D000818:Animals; D005075:Biological Evolution; D002869:Chromosome Aberrations; D006570:Heterochromatin; D007621:Karyotyping; D051379:Mice; D010542:Peromyscus / Q000235:genetics*; D013045:Species Specificity
chemical_list: D006570:Heterochromatin