Heterochromatin and sister chromatid exchanges in the chromosomes of Microtus agrestis.
D000818:Animals; D003411:Arvicolinae; D002460:Cell Line; D002842:Chromatids; D002875:Chromosomes; D005260:Female; D006570:Heterochromatin; D008297:Male; D012377:Rodentia; D012730:Sex Chromosomes
D006570:Heterochromatin