Abstract
In this study four asymptotically equivalent estimates of kinship are derived, in the general case and for kinship between multiallelic loci. Two estimates based on chi 2 agree closely, with the Shannon estimate giving the smaller variance. The PAH, GH, GM, and HBB systems conform to a recombinational model with an evolutionary size of approximately 4,000 and a ratio of recombination to physical distance of approximately 1.4 X 10(-5) morgans/kb, as predicted on the basis of the genetic and physical lengths of the human genome. The INS and D11S12 systems have a much more rapid decline of kinship with physical distance, suggesting overlapping RFLPs (unrecognized allelism), recombinational hot spots, or selection. Sources of error in predicting kinship over small distances are discussed.
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