192 



GENETICS 



A CLASSIFICATION OF HYBRID SKIN COLORS ON THE BASIS OF THE 

 FACTOR HYPOTHESIS 



which any one of these five degrees of color has of 

 reappearing in a child of mulatto parents is indicated 

 in Fig. 43. It is evident that there is more likelihood, 

 in point of fact six chances out of sixteen, that a 

 child from mulatto parents will be mulatto than any- 

 thing else, and this expectation ordinarily agrees with 

 the realization, but there are four chances out of six- 

 teen that it will be either darker or lighter than its 

 parents and one chance out of sixteen that it will be 

 as dark or as light as its black or white grandparents. 



Davenport and Danielson show several illuminating 

 photographs of large families of children from mulatto 

 parents in which a manifest inequality of color shade 

 among the different children is apparent as would be 

 expected according to this explanation. 



Blending inheritance, then, is probably nothing more 



