Karyotyping.
D000818:Animals; D002460:Cell Line; D002875:Chromosomes / Q000032:analysis; D006224:Cricetinae; D006651:Histocytochemistry; D006801:Humans; D007621:Karyotyping / Q000379:methods*; D008297:Male; D051379:Mice; D051381:Rats; D012737:Sex Factors