THE MUTATED GENE 



159 



pendently of those already mentioned. These results may be 

 summarized in graphic representation in Fig. 32 (from Wright). 

 The average grades of sepia (solid), brown (dot and dash), and 

 yellow (dash) are given in the combinations of the albino series 



Table 19 



(From Wright) 



Average grades of sepia and brown in different combinations 



Average grades of yellow in different combinations 



Average grades of pale sepia or of yellow 



C series 



FFppBB 

 pale sepia 



FfppBB 



pale yellow 



sepia 



ffppBB 

 cream 



C... 

 C d C d . 

 C r C r . 



9.70 

 4.88 

 2.58 



7.60 

 3.40 

 



2.15 











and the/, b, p gene mutations. E means black; e, yellow parts 

 of the fur. This analysis of genie interaction, which thus far is 

 the most elaborate one, again shows the genes at work in the way 

 expressed before as a system of reaction velocities in tune. 



As a kind of supplement to this analysis it might be mentioned 

 that Hadjidimitroff (1933) found that the amount of pigment 



