PLATE 6 



Skeletons and leg bones of two contrasted litter mate backcross shepherd-bassethound- 

 shepherd hybrids (photographs from life in plate 5). No. 653$ has inherited one gene for 

 achondroplasia from the Fj parent, and 652 <$ is pure for long legs. 



lands 653$ 3 tibia of 653 $ (left) and 652 ^ (right). 



2 and 6 652^ 4 humerus of 653$ (left) and 652^ (right). 



60 



