Mammalian X-chromosomes: change in patterns of DNA replication during embryogenesis.
D000818:Animals; D001345:Autoradiography; D002455:Cell Division; D002875:Chromosomes / Q000378:metabolism*; D006224:Cricetinae; D046508:Culture Techniques; D004247:DNA / Q000096:biosynthesis*; D005260:Female; D005347:Fibroblasts / Q000378:metabolism; D011247:Pregnancy; D013936:Thymidine / Q000378:metabolism; D014316:Tritium
D014316:Tritium; D004247:DNA; D013936:Thymidine