Replication of the mouse sex chromosomes early in the S period.
D000818:Animals; D001345:Autoradiography; D002869:Chromosome Aberrations; D004261:DNA Replication; D005260:Female; D006570:Heterochromatin; D008297:Male; D051379:Mice; D008938:Mitosis; D012730:Sex Chromosomes / Q000378:metabolism*; D013936:Thymidine / Q000378:metabolism; D014316:Tritium
D006570:Heterochromatin; D014316:Tritium; D013936:Thymidine