30 MENDELISM chap. 



colour in man are but a few examples of the diversity of 

 characters which all follow the same law of transmission. 

 And as time went on many cases which at first seemed to- 

 fall without the scheme have been gradually brought into 

 line in the light of fuller knowledge. Some of these will be 



Fio. 2. 



A wing feather and a contour feather of an ordinary and a silky fowl. The peculiar 

 ragged appearance of the silky Wthers is due to the absence of the little hooks or 

 barbules which hold the barbs together. The silky condition is recessive. 



dealt with in the succeeding chapters of this book. Mean- 

 while we may concern ourselves with the single modifica- 

 tion of Mendel's original views which has arisen out of 

 more ample knowledge. 



As we have already seen, Mendel considered that in the 

 gamete there was either a definite something correspond- 



