title: Gene differentiation in four subcastes of Brahmins from Visakhapatnam, Andhra Pradesh.
abstract: Blood group (ABO, MN, Rh, CcDEe) polymorphisms are reported here for 4 strictly endogamous subcastes of Andhra Brahmins. The coefficient of gene differentiation calculated from the gene frequencies is 0.87% demonstrating that only a small fraction of the total gene diversity is attributable to the differences between subcastes. In spite of the strict endogamy for the past 10-14 centuries, 99.13% of gene differentiation exists within the subcastes.
mesh_terms: D000017:ABO Blood-Group System / Q000235:genetics*; D005787:Gene Frequency; D006579:Heterozygote; D006801:Humans; D007194:India; D008951:MNSs Blood-Group System / Q000235:genetics*; D010641:Phenotype; D012204:Rh-Hr Blood-Group System / Q000235:genetics*
chemical_list: D000017:ABO Blood-Group System; D008951:MNSs Blood-Group System; D012204:Rh-Hr Blood-Group System