TRANSFORMATION OF OVARIES TO TESTES IN THIOUREA TREATED FROG LARVAE

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1. The tadpoles of Rhacophorus schlegelli were treated with 0.025 per cent thiourea solution for various periods of time, and the effect of thiourea on sex differentiation was studied.<BR>2. In the treated tadpoles killed 6 weeks after the beginning of the treatment, and 3 weeks thereafter, sex ratio was observed as 1:1. In the treated tadpoles, however, fixed 12 weeks after the beginning of the treatment, male individuals remarkably increased in number. Such data are implicable that the transformation of the ovaries to the testes took place in the treated tadpoles.

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