Concerning the Hereditary Adaptation of Organisms to Higher Temperature

Abstract

1. Imagos of Drosophila raised at temperatures of from 12-28.5 degrees C. when placed at any temperature from 15-32.5 degrees C. produce eggs which develop normally at these temperatures. 2. Imagos raised at temperatures of from 29-32.5 degrees and then kept permanently within these temperatures produce eggs which do not develop. 3. Imagos raised at from 28.5-32.5 degrees C. and then placed at temperatures of from 12-25 degrees C. produce eggs which develop normally. 4. Imagos raised at from 28.5-32.5 degrees C. placed at 15-25 degrees C. for 24 hours or longer and then put back into a temperature of from 28.5-32.5 degrees C., produce eggs which will develop at the latter temperature. 5. There is no evidence of any hereditary adaptation to higher temperatures.

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Cite this paper

@article{Northrop2003ConcerningTH, title={Concerning the Hereditary Adaptation of Organisms to Higher Temperature}, author={John H. Northrop}, journal={The Journal of General Physiology}, year={2003}, volume={2}, pages={313 - 318} }