Inheritance of Human Characters 129 



when any egg is fertilized the person produced is 

 an FF individual. Out of 144 such matings 

 resulting in 482 offspring whose records are 

 known, Goddard found that 476 were feeble- 

 minded. This t)rpe of mating as well as others 

 cited below are illustrated in the family pedi- 

 grees shown on pages 130 and 131, selected 

 from Goddard's book. 



If a person comes from parents one of whom 

 is entirely normal and one is feeble-minded with 

 many feeble-minded ancestors, it is probable 

 that such an individual is a hybrid with germ 

 cells that, as far as this one character is con- 

 cerned, can be designated NF. Such a person 

 will pass for normal, since feeble-mindedness is 

 recessive. If such a one mates with the type 

 described above (FF), it would be expected 

 that half the offspring would be normal, half 

 feeble-minded. Out of 122 such matings pro- 

 ducing 371 children, 193 were found to be 

 feeble-minded, 178 normal, which is remarkably 

 close to expectation considering the difficulty of 

 determining with certainty the real character 

 of the parents. When two individuals of the 



