(r>s), repulsion (r < s) and to independent inherit- 

 ance (r=s). It, of course, gives the same result as the 

 empirical formulae of Bateson and Punnett, but is more 

 convenient in that one formula, takes the place of the 

 two. It is easy to use since the fourth term of the 

 zygotic series is the square of r, the second and third 

 terms each the square of s plus twice the product of r and 



