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Scheme of the reproductive system in triploid Batura toads with hypothetical mechanisms (a) and (b) for oogenesis and (c) and (d) for spermatogenesis. Blue NOR− symbol: unrecombined (clonal) chromosome set without NORs. Red or magenta NOR+ symbols: different NOR-carrying chromosome sets. Mixed red and magenta NOR+ symbols: recombined NOR-carrying sets. The mechanisms confirmed in the present study are framed.
