M 



INHERITANCE IN CUINEA-PIGS. 



The following table gives a summary of the data bearing on the 

 inheritance of the albino series of allelomorphs based on these conclu- 

 gi on8 n will be noticed that animals of every possible formula have 

 been tested by crosses with albinos, the lowest recessives. No attempt 

 has been made bo make all other possible crosses, and several (especially 



Tabu 86, -Summary of albino series crosses (crosses 16 to 44). 



Parents. 



Int. dm x albino. 



Dilute X albino. 



\,- \ albino 



Albino X albino. . 

 Intense x red-eye 



Dilute x dilute 

 Intense x intense 



Formulas. 



X C a C a . • • 

 < '( (I CaCa- • ■ 

 CCr CaCa- • • 



CCa CaCa- • • 



I il' d X CaCa- • ■ 

 ( VlC'r C a Ca- • • 

 CdCa CaCa- • • 



CrCr X CaCa- 

 CrCa CaCa • 



Int. 



40 



31 



9 



64 



Dilute X red-eye. . 



Red-eye X red-eye 

 Intense X dilute 



Ca^a X va^a- • • 



°* {§£}■■ 

 °* {§§}• 



CdCa 



CrCr. 

 CrCa. 



CrCa X CrCa- 



CC X CdCd. 

 CC CdC a . 



CCd CdCd. 

 CCd CdC a . . 

 CC., CdCd- 

 CCa CdC a. . 



Dil. 



R.E. 



36 



26 

 18 

 98 



9 

 28 

 25 



CdCdX CdC a . 



CCd X CCd • • - 

 ('<',1 CC a .... 



CC CC . . . . 



14 

 12 

 10 

 32 

 12 

 28 



31 



15 



1 

 13 



24 



30 

 6 



W. 



71 



20 



57 

 75 

 X 



i 

 40 

 10 

 22 



15 



82 



19 

 35 



1 

 5 



17 



79 



3 

 X 



From crosses- 



15 



24 



17a, 6. 



186, 34, 41 



21 



17c, 17d, 18c, 22 



16a, 38a, 44 



19,27 



166, 16c, 19, 27, 33, 386, 44 



25 

 23,25 



Long established. 



20 



18a, 20 

 18c 



20, 26, 43 



20 

 26,43 



24 



28 

 35 



29, 40a 

 32, 36, 40a 

 28, 40a 

 36, 406 



30, 37, 42 

 37,42 



31,39 

 39 



See rough and Lima crosses 



ones involving red-eye) have not yet been made by the writer. The 

 Lasl column refers to the crosses tabulated at the end of the paper. 

 The ratio- expected are obvious from the nature of the matings, except 

 that 39 to 11 were not random crosses of their kind. The appearance 

 of recessive young was used as a criterion of the nature of the parents 

 in these cases. This causes an excess of recessives to be expected. 



