33 



COAT CHARACTERS IN GUINEA-PIGS AND RABBITS. 



/ Seven of my albino animals contain latent black, but transmit it appa- 

 / rently to only about half of their offspring. Matingsof such albinos with 

 I red or yellow animals are enumerated in Table E. 



The pigmented young produced by these matings are 41 black pig- 

 mented, 37 free from black pigment (. e., bearing only red or yellow 

 pigment in their coats). The obvious explanation is that only one of 

 the two gametes which united to form each of these albino parents 

 contained latent black, the other being free from it ; consequently only 

 half the gametes formed by the albinos contain latent black. 



TABLE E. Matings of albinos {part only of whose gametes transmit latent black) 

 with red or yellow animals. Approximately half of the figmented offspring 

 have black pigment in their coats. 



