108 



INHERITANCE IN GUINEA-PIGS. 



No rough E young were produced in the crosses under (2) where 

 one parent was full-rough. 



TABLE 48. 



(4) Partial-roughs crossed together may give all grades of roughness 

 from full-rough (A) to the lowest partial-rough (E) . 



TABLE 49. 



(5) Full-roughs crossed together have never given partial-roughs. 

 Crosses in the 4-toe and Lima stock have already been given. Below 

 are crosses of rough A by rough A in the tricolor and cutleri stocks in 

 which each rough A parent had one or both of its parents partial- 

 rough (C, D) or in the case of the cutleri hybrids, an FI hybrid. 



TABLE 50. 



(6) Full-roughs, one or both of whose parents were partial-roughs, 

 have given no partial-rough young in crossing with smooths of 4-toe 

 stock. 



TABLE 51. 



In (73) two of the \ cutleri rough A did not come from a partial-rough 

 parent, but from smooth \ cutleri hybrids. 



