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139. Patterson, J. T. The mechanism of mosaic formation in Drosophila. Gene- 

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148. ScHULTZ, J. X-ray effects on Drosophila pseudoobscura. Genetics 18: 284- 

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149. ScHULTZ, J., and Th. Dobzhansky. The relation of a dominant eye color in 

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150. Serebrovsky, A. S. A general scheme for the origin of mutations. Amer. 

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153. Serebrovsky, A. S., N. P. Dubinin, I. I. Agol, W. N. Sliepkoff, and W. E. 

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