Point Mutants — Detection and Ejfects 



209 



(OX 

 ZH 

 OliJ 



H"* 

 <UJ 



82 



Zico 

 (nco 



ZUJ 



<o 

 q:lij 

 ho: 



OQ 

 UJUJ 



oo 

 zz 



-3.6 



2 6 10 14 18 22 26 30 34 38 

 DOSE IN RADS(XIOO) 



FIGURE 24-3. Percentage of mutations, ±2 X standard 

 error, recovered from Drosophila sperm exposed to 

 different dosages of 18 mev electrons. The sex-linked 

 recessive lethal frequencies (L) are joined by solid lines 

 and are adjusted for the control rate; sex chromosome 

 loss frequencies (S) are connected by broken lines and 

 are corrected for the control rate; reciprocal translo- 

 cation frequencies iT) between chromosomes II and III 

 are connected by dot-dash lines. [From I. H. Herskowitz, 

 H. J. Muller, J. S. Laughlin, Genetics, 44: 326, 1959.) 



