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Relationship between heterozygosity and genetic distance in the 3 major races of man


, : Relationship between heterozygosity and genetic distance in the 3 major races of man. American Journal of Physical Anthropology 65(3): 249-258

In pairwise comparisons of gene frequency data from the 3 major races of man, the single locus measures of the heterozygosity within and the genetic distance between races are strongly correlated across the loci coding for red cell proteins and enzymes. The intercept of the regression line of genetic distance on heterozygosity in protein enzyme loci is statistically insignificant. The genetic variability at the enzyme and protein loci in man is probably maintained by a balance of mutation and random genetic drift. At the blood group loci the observed relationship between genetic distance and heterozygosity does not follow the expectation of the neutral mutation hypothesis. These observations are discussed in terms of the changes in probability of identical monomorphism in 2 populations during the process of gene differentiation.

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