PLATE 28 



Contrasting the degree of reaction to achondroplasia of bulldog and Saluki- 

 bassethound bone constitutions. 



L F 2 Bassethound-Saluki 1211 rf, ss. 



R Backcross bulldog-bassethound-bulldog 1479 , si. 



The heterozygous condition for achondroplasia of 1479 < exerts a considerably 

 greater influence on its bull bone constitution than does the homozygous condition 

 of 1211 <$ on the Saluki-bassethound bone constitution. 



123 



