So in this particular case this is the F one generation. The F two generation is this entire distribution here. So from this distribution we see that the F two generation offspring will be most likely the same exact skin color as these two individuals as the parents. So this is what we mean by polygenic inheritance. So we see that polygenic inheritance refers to the phenomenon by which multiple different allele pairs have a similar and an additive effect on the given trait. And by additive we simply mean the genes are incompletely dominant with respect to one another.