702 



p 



F, 



R 



P 



R 



Fz 



yellow 



torioiseshell 



black 

 yellow 



(S? €J 



yellow tortoiseshell yellow ^^ 



black 



(QJ 



tortoiseshell 



yellow 

 black 



\» -/ 



iorioisesheil black yellow 



Fig. 543. — Crosses between black and yellow cats. 0=gene for yellowness. 

 • =gene for blackness. — =absence of black/yellow gene. 



