INHERITANCE IN ABNORMALITIES 



405 



ABNORMAL 

 ABNORMAL 



ABNORMAL! 



ABNORMAL ABNORMAL ABNORMAL ABNORMAL. 



ABNORMAL 



DEAD 



DEAD 



Fig. 7 Part of the pedigree of 39b, one of the short-lived races which re- 

 mained abnormal throughout its life. The broken connecting lines designate 

 the omission at that point of two entirely normal generations. 



