160 



INHERITANCE IN GUINEA-PIGS. 



Table 136. 

 Cross 75. — Rough A, B (J culleri) X rough A (J cutleri). 

 Rres X Rres = 3 Rss + rres (3 A : 1 Sm). 



Table 137. 



Cross 76. — Rough C (f cutleri) X rough C (£ cutleri). 

 RSs X RSs = Rss + 2 RSs + RSS (1 A : 2 C : 1 E : ? Sm ?). 



Table 138. 



Cross 77. — Black (BB) X agouti (pure cutleri). 

 Parents and offspring all smooth. 



Table 139. 



Cross 78.— Black (BW) X agoutf (§, \, \ cutleri). 



Expectation : 1 Ag : 1 black : some white. 

 Parents and offspring all smooth. 



