REDUPLICATION IN MICE. 

 (Preliminary Communication.) 



By J. B. S. HALDANE, B.A., 



Lieut. 3rd Black Watch, New College, Oxford; 



A. D. SPB,UNT, B.A., 

 Late '2nd Lieut, ith Bedfordshire Regt., New College, Oxford ; 



AND N. M. HALDANE, 

 Home Student, O.eford. 



(From the Lahoratorij of the Department of Comparative Anatomy, 



Oafurd.) 



Darbishibe's (1) experiments indicated the existence of Redupli- 

 cation in Mice, and tiiis work was undertaken to verify and extend his 

 results. Owing to the war it has been necessary to publish prematurely, 

 as unfortunately one of us (A. D. S.) has already been killed in France. 

 He was a man of considerable promise, and his death is a real loss 

 to Zoology. 



The reduplication occurs between the tiictors named by Miss 

 Durham (2) C and E, the absence of C producing albinism, that of E 

 (when C is present) pink eyes and a coloured but pale coat. It is thus 

 not possible to distinguish ce (albino) and Cee {\Ank eyed pigmented) 

 mice on birth ; hence mice with pink eyes dying before the hair is 

 grown camiot be distinguished, whereas CE (dark eyed) mice are at 

 once identifiable. 



8 cc and 8 Cee mice were mated. All tin- cc's were of composition 

 ccEE, two of the Cee's were Ccee, the rest CCee. 



