20 



COAT CHARACTERS IN GUINEA-PIGS AND RABBITS. 



TABLE A. Proportions of albino young produced by hybrid pigmented parent* 

 of different amounts of albino ancestry. 



TABLE B. Proportions of albino young produced by meltings bet-ween albinos 

 and hybrid pigmented animals, both ivith varying amounts of albinism in 

 their ancestry. 



Throughout Table A we find the expected Mendelian ratio (i : 3) of 

 albino to pigmented young approximated, quite irrespective of the 

 amount of albino ancestry back of the parents mated. Of course, there 

 are marked deviations in individual cases where the number of young 



