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Document Type

Research

Abstract

In the course of an investigation of the effects of X-Rays on embryonic development of Melanoplus differentialis, it was noticed that abnormalities appeared in some of the individuals. More eggs were rayed, dosages comparable to those given the embryos in which abnormalities appeared, and the following observations have been made. (1) There was a critical stage for the production of abnormalities. Eggs rayed when the embryos were extremely young usually resulted in only deficiencies of various degrees. Eggs rayed when the embryos were just a few days older resulted in embryos exhibiting many abnormalities. Still older embryos produced no abnormalities following irradiation. (2) There was also an effective range of dosage. Too small a dosage gave no effects, too high a dosage caused cessation of growth and degeneration before abnormalities could be discerned.

Publication Date

1935

Journal Title

Proceedings of the Iowa Academy of Science

Volume

42

Issue

1

First Page

207

Last Page

208

Copyright

© Copyright 1935 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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