100 



THE INHERITANCE OF COLOR IN MICE. 



Cross 199. 



Albino x pink-eyed brovm. 



Mating. 



517 

 536 

 458 

 540 

 466 

 518 

 498 

 470 

 516 

 497 

 t7s 

 51 18 

 505 

 429 

 578 



Parents. 



Unmarked x unmarked. 



4871 x-07 



Unmarked x 440 



4873 x-07 



4870-73 x -07 



4870 x unmarked 



1^70 x-07 



4272x5162 



1285 72x5162 



4872 x-07 



4273x5163 



1285x5162 



4271 X5163 



1108x3746 



Unmarked x unmarked 



2 

 2 



B. 



1 



3 

 4 

 3 



BrAg. 



1 



Br. 



8 

 7 

 6 

 1 

 9 

 3 

 1 

 6 

 5 

 1 



2 

 2 



P B. 



pBrAg. 



8 

 3 

 5 



pBr. 



Formula of 

 albino parent. 



3 



6 

 2 



7 

 3 



BrtDtPi. 

 BriDzPi. 



Br 2 D- 2 P 2 . 



BroBDiPt. 



Br 2 BDtP,. 



Br t BD,P t . 



BrtBDiP t . 



Br 2 D 2 Pp. 



BrtDzPpA. 



Br,BD 2 Pp. 



Br 2 D 2 p 2 A. 



BnDtpzA. 



Br 2 D 2 p 2 A 2 . 



Br 2 D 2 P 2 R. 



BriBDiPsAR. 



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 carrying 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 

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

 fore be tested by breeding. 



Pink-* i/i'l black agouti x brown. 

 Cross 202. 



*Probable incorrect classification. 



