 The kinship coefficient decreases as a function of distance and if a mutation occurs in either locus or if the gamete kinship chain is zero, the kinship coefficient will be zero.Yoichi Ishida interprets alteration in neighborhood size as alteration in dispersal variance linking both Wright's statistical theory and Malécot's probabilistic theory explaining why they both invite similar conclusions.Alteration in neighborhood size is alteration in dispersal variance and alteration corresponds to alteration in the variance of the probability of distribution associated with migration probabilities.