BLENDED INHERITANCE in 



blended ; but there may be quantitatively more of the maternal 

 quality or of the paternal quality expressed, and then we say 



FIG. 24. Leaves of Willow : A, of one parent ; C, of the other parent; 

 B, of the hybrid intermediate between them. (After Wiesner.) 



that in the blended inheritance or in its expression one of the 

 two parents is prepotent. An increase in the predominance of 

 the characteristics of one parent leads to the second common 



mode of inheritance, which we call exclusive. 



W. E. Castle (Jy urn. Washington Acad. Sci., vn., 1917, 369-87) 

 states his conclusion that " aside from colour, there are very 

 few valued economic characters in our domestic animals which 

 are. not inherited after the manner of blending." It must be 

 noted, however, that in a very large number of cases of in- 

 dubitable Mendelian inheritance the hybrid offspring is inter- 

 mediate between the two parents. What is called " incomplete 

 dominance " may simulate true blending, such as is probably 

 illustrated in human stature. 



