title: Meiosis in the grasshopper. II. The preleptotene spiral stage during oogenesis and spermatogenesis in Melanoplus femur-rubrum.
mesh_terms: D000818:Animals; D001345:Autoradiography; D002875:Chromosomes; D003434:Crossing Over, Genetic; D004261:DNA Replication; D005260:Female; D006110:Grasshoppers; D008297:Male; D008540:Meiosis; D008722:Methods; D010053:Ovary / Q000166:cytology; D010063:Ovum / Q000166:cytology*; D013091:Spermatogenesis; D013094:Spermatozoa / Q000166:cytology*; D013737:Testis / Q000166:cytology; D013936:Thymidine / Q000378:metabolism; D014316:Tritium
chemical_list: D014316:Tritium; D013936:Thymidine