COAT CHARACTERS IN GUINEA-PIGS AND RABBITS. 37 



Red X albino. The result of this cross depends upon what latent 

 pigment characters are borne by the albino, and this in turn may in 

 some cases be inferred from the ancestry of the albino, though in other 

 cases not. Most of the albinos witli which I have experimented contain 

 latent black as well as red, and when mated with red or yellow animals 

 produce invariably black-pigmented offspring. The matings indicated 

 in Table D fall into this category of cases. 



TABLE D. Matings of albinos (all of -whose gametes transmit latent black) with 

 red or yellovj animals. The pigmcnted offspring all have black pigment 

 in their coats. 



Sixteen different albinos mated, as indicated in the table, with red, 

 yellow, or cream animals, produced 59 pigmented young, all bearing 

 black pigment. 



