100 THE INHERITANCE OF COLOR IN MICE. 



Albino X pink-eyed broum. 

 Cross 199. 



Mating 



Parents. 



Y. 



B. 



BrAg. 



Br. 



pB. 



pBrAg. 



pBr. 



Formula of 

 albino parent. 



517 

 536 

 458 

 540 

 466 

 518 

 498 

 470 

 516 

 497 

 478 

 508 

 505 

 429 

 578 



Unmarked x unmarked . 



4871 X -07 



Unmarked x 440 



4873 X -07 



4870-73 X -07 



4870 X unmarked 



4870 X -07 



4272x5162 



4285-72x5162 



4872 X -07 



4273x5163 



4285x5162 



4271x5163 



4408x3746 



Unmarked x unmarked. 



1 



BrAPi. 



BtiDiPi. 



BriDiPi. 



BriBDiPi. 



BriBDiPi. 



BriBDiP^. 



BriBDiPi. 



BriDiPp. 



BriDiPpA. 



BriBDiPp. 



BriDip^A. 



BriDipiA. 



BriDip^Ai. 



BriDiPiB. 



BviBDiPiAR. 



A small number of more accurate tests of albinos follow: 



Albinos x pink-eyed dilute brown. 

 Cross 200. 



Both 7551 and 7868 albinos turned out potentially homozygous dilute brown animals. 

 Two crosses between homozygous dilute brown animals carrsang albinism, and 7868 albino, 



together with another albino (7748) of similar constitution, follow: 

 Cross 201. 



The expectation is equality of white and dilute brown young. 



The following case may in one sense be considered as unconformable. It seems probable, 

 however, that the animal recorded as yellow was a dilute form, for the experiment 

 occurred early in the series (1907) before I had learned to recognize dilute animals by 

 sight when young. This animal did not live more than two weeks and could not there- 

 fore be tested by breeding. 



Pink-eyed black agouti x brown. 

 Cross 202. 



*Probable incorrect classification. 



