The absence of labeled RNA on metaphase chromosomes of Taricha and Rana embryos.
D000818:Animals; D001001:Anura; D001345:Autoradiography; D002875:Chromosomes; D046508:Culture Techniques; D004625:Embryo, Nonmammalian / Q000166:cytology*; D008938:Mitosis; D012313:RNA; D014316:Tritium; D014529:Uridine / Q000378:metabolism
D014316:Tritium; D012313:RNA; D014529:Uridine