ON HEEEDITT IN KABBITS, 31T 



The first two pairs of unit characters, short and Augoi'a coat, 

 normalitj and albinism, have been fully investigated, and in 

 their heredity are found to follow Mendel's original Pisum type 

 in regard to dominance, segregation, and gametic purity. 



Short and Angora coat. — The Angora coat is recessive to short 

 coat in the first generation, segregates in Mendelian proportions 

 in the second generation, and breeds true in the third generation, 

 notwithstanding its dominant short-coated ancestry. 



The short coat is dominant over Angora coat in the first 

 generation, and segregates in Mendelian proportions into two 

 breeding forms in the second generation — pure and hybrid. 



The pure form breeds true in the third generation, notwith- 

 standing its Angora ancestry, while the hybrid form gives a 

 mixture of shorts and Angoras in Mendelian proportions. 

 Owing to dominance, the pure and hybrid shorts are indistin- 

 guishable in appearance, and can only be determined definitely 

 by experimental breeding. 



Normality and Albinism. — Albinism is recessive to normality 

 in the first generation, segregates in Mendelian proportions in 

 the second generation, and breeds true in the third generation, 

 notwithstanding its dominant normal ancestry. 



JNorinality is dominant over albinism in tlie fii'st generation, 

 and segregates in Mendelian proportions into two breeding 

 forms in the second generation — pure and hybrid. 



The pure form breeds true in the third generation, notwith- 

 standing its albino ancestry, while the hybrid form gives a 

 mixture of normals and albinos in Mendelian proportions. Owing 

 to dominance, the pure and hybrid normals are indistinguishable 

 in appearance, and can only be determined definitely by experi- 

 mental breeding. 



The investigation of the two remaining pairs of unit characters, 

 grey and black coat, self-colour and Dutch markings, is not yet 

 completed. So far as the experiments go, however, the following 

 results appear : — 



Grey and llach coat. — Black is recessive to grey in the first 

 generation, segregates in Mendelian proportions in the second 

 generation, and breeds true in the third generation, notwith- 

 standing its grey ancestry. 



Grey is dominant over black in the first generation, and 

 appears to segregate into two breeding forms in the second 

 generation— pure and hybrid. 



