BLENDING INHERITANCE 



191 



present, and in Figure 43 is a graphic representation 

 of the numerical chances for skin-color in spite of 

 segregation when two mulattoes mate. 



AB 



Ab 



aB 



ab 



AB 



Ab 



aB 



ab 



AB 



a b 



70 



55 



53 



Ab 



AB 



55 



Ab 



40 



- 



aB 

 AB 



53 











/Ab 



21 



ab 



a b 

 B 



23 



21 



6 



FIG. 42. Checkerboard to show the different expected shades of 

 black color in the possible offspring of two mulattoes. A = 

 18; B = 17; a = 2; b = l percent of black pigment. Data 

 from Davenport and Danielson. 



The case thus is similar to that of Nilsson-Ehle's 

 brown-chaffed wheat already described, so that the 

 possible range of offspring of a mulatto pair is all the 

 way from black to white. Theoretically, any one of 

 five degrees of pigmentation, including the extremes 

 of black and white, may be expected. The chances 



