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Biol Bull 106: 100-106. (February 1954)
© 1954 Marine Biological Laboratory
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AN X-RAY DOSE-ACTION CURVE FOR EYE-COLOR MUTATIONS IN MORMONIELLA

DAVID T. RAY 1 and P. W. WHITING 1

1 Howard University, Washington, D. C., University of Pennsylvania, Philadelphia, Pa., and the Marine Biological Laboratory, Woods Hole, Mass.

1. X-ray dose-action curves for visible mutations in Drosophila are discussed. An x-ray dose-action curve for eye-color mutations in Mormoniella is presented. Within the limits of error of the experiments the curves may be of the straight-line type indicating that single hits produce the mutations. However, in the Mormoniella curve an insignificant dip occurs at the mid-point, 2680 r, suggesting the possibility of a second factor.

2. A shortened chi square method of testing goodness of fit to a straight line is presented. With reference to the present Mormoniella data, the deviation is shown to be insignificant.






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Copyright © 1954 by the Marine Biological Laboratory.