50 A MANUAL OF MENDELISM 



^. One albino (No. 14) was found which, with grey pure, 

 threw 7 greys ; with grey hybrid in Y, 2 greys and 

 2 blacks ; with grey hybrid in Y and C, 1 grey, 3 blacks, 

 and 2 albinos ; and, with black hybrid in C, 6 blacks and 

 12 albinos. That is to say : an albino was found 

 which, in four out of the six possible tests, showed itself, 

 by its progeny, to be of the kind we have called albino 



V c. 



No. 2, and therefore of the constitution "^ 



yc. 



Another albino (No. 39) was found which, with black 

 hybrid in C, gave 2 greys, blacks, and 1 albino — thus 

 showing itself different from No. 14— and, with black) 

 pure, gave 4 greys and 4 blacks, thus showing itself, in| 

 two out of the six possible tests, to be of the kind we, 

 have called albino No. 1 hybrid in Y. Three others 

 (15, 16, and 34), with pure blacks, threw 16 greys, 

 16 blacks, and no albinos, and thus showed themselves 

 to be of the same kind. No albino of the kind No. 1, 

 pure, seems to have been found and bred from. 



Thus among the descendants of the original grey and 

 albino parents there were two kinds of albinos, and the 

 three groups of hybrids' progeny, consisting of 85 greys, 

 25 blacks, and 30 albinos, were really four groups as 

 follows : 



We are now in a position to suggest what may be the 

 effects of the factors C and c. It will be noticed that 

 grey differs from albino No. 1 in containing C instead 

 of c, while black differs similarly from albino No. 2. 





