200 



MENDELISM 



at present available deal with characters which are 

 usually classed as abnormal. In some of these the 

 inheritance is clearly Mendelian. One of the cases 



Fig. 



49- 



Normal and Ijrachydactvlous hands placed Lugether for comparison. 

 (From Drinkwater.) 



which has been most fully worked out is that of a 

 deformity known as brachydactyly. In brachy- 

 dactylous people the whole of the body is much 

 stunted, and the fingers and toes appear to have two 

 joints only instead of three (cf Figs. 49 and 50). 



