36 INHERITANCE OP COAT-PIGMENTS AND COAT-PATTERNS 



Table 3. — Expected and observed distribution of young produced by partial- 

 albino rats mated uith albinos. 

 [Abbreviations as in table 1.] 



o 

 55 



IS 

 16 



17 

 18 



19 

 20 

 21 

 22 

 23 



Nature of mating. 



GICVV.BH)XVV[BH] ... 



GH(\V.B)XW[BH] 



GH(B;XW[BH] 



BHXW[GB-H] 



BHxWrB-IH] 



BI(W.H)xW[GB-IH] , 

 BI(W.H,xWLB-IH]... 



BH(\V)XW[GII] 



BH(W;xW[B-IH] 



Proportions of off- 

 spring expected on 

 Mendelian hypothesis. 



GI. GH. BI. BH. W. 



Totals, observed. 

 Totals, expected., 



Observed result 

 (expected result, italic). 



GI. GH. BI. BH. W, 



K 

 I » 



\ 41 

 ( o 



'( o 



12 



12.2 



7 

 8.1 



4 

 6 



'25 



8 

 11.5 



o 



o 



2 



'■4 

 o 

 o 

 8 



65 



o 



o 



40 



4b 



6 



8./ 



o 



o 



o 



o 



o 



o 



9 

 // 



S 



4' 

 12 

 lO.S 



o 



o 



24 



'7 



56 

 50-7 



II 



8.1 



6 



6 

 14 



15 



ii.S 



13 



II 



2 



6 



J-5 

 o 



o 

 17 

 ■'7 



7^ 



34 



3^-5 



H 



12 

 O 

 O 

 Q 

 O 

 O 

 O 



8 

 // 

 10 

 '4 



s 



27 



98 



Table 4. — Average grade {size oj stripe) in the various lots 0} hooded rats of selected 

 parentage, as compared with the average grade of their parents. 



