INHERITANCE IN RACE HORSES 91 



gametic constitution is fully corroborated (Plate 2). 

 Following the maternal line we find that grand, great- 

 grand, and great-great-grand maternal ancestors 

 were all grey. On the paternal side, seven of the 

 ancestors and the sire, " Radautz Amurath," were 

 whites (greys). Now, from the Mendelian stand- 

 point, the nature of the maternal parentage was 

 such, that the mother herself must have been an 

 impure grey, that is, was D R for greyness, carrying 

 in one-half of her sex cells the factors for greyness, 

 and in the other half the factors for bayness i)rob- 

 ably, while those for chestnut are not necessarily 

 excluded (Plate 2). On the paternal side, the father 

 was also an impure grey, because his parents were a 

 grey mare and a bay stallion. He was, therefore, 

 carrying in one-half of his sex-cells the factors for 

 greyness, and in the other half those for bayness. 



The parents of " Celle Amurath " are probably 

 thus both gametically similar, in that both are 

 carrying sex-cells some of which bear greyness 

 and others bayness. " Celle Amurath," from the 

 Mendelian standpoint, is thus the product of the 

 meeting of a grey-bearing egg-cell of the grey 

 mare with a grey-bearing sperm-cell of the grey 

 stallion. His gametic or sex-cell constitution is 

 thus G G if we symbolise the actual colour, or D D 

 if we symbolise the fact that greyness is the 

 dominant colour. 



That this Mendelian interpretation of the gametic 

 constitution of "Celle Amurath" and of his parents 

 may be regarded as correct is further corroborated 



