Phenomena of Inheritance 



ill 



AB Ab 



aB 



a b 



FIG. 34. CHECKERBOARD DIAGRAM SHOWING RESULTS OF CROSSING Two 

 MULATTOES, each having color factors ABab. Types of male gerih cells 

 are above the square, of female cells on the left and the possible combina- 

 tions of these are shown in the 16 small squares. Homozygotes are found 

 only along the diagonal. The color of the children varies all the 

 way from black (upper left corner) to white (lower right corner). 



FIG. 35. MULLATTO HUSBAND AND WIFE AND THEIR SEVEN CHILDREN 

 ranging in color from the one on left who "passes for white" to the 

 youngest who is typically black. (From Davenport.) 



