Palmar dermatoglyphs of South African Negroes and Coloureds.
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Frequencies of the CHE1*A allele were estimated on the basis of a sample of 999 Caucasians (1.5%) and 1,015 Negroids (0.84%) from Curitiba, Brazil. The frequency found in the Negroid subsample allows an estimate of 50 +/- 15% of Caucasoid admixture and an average gene flow in the white-black direction of the order of 5.6% per generation.
A total of 461 individuals, belonging to some Subsaharan populations (Beti, Bateke and Babenga Pygmies of Congo; Goun and Nago of Benin; Mbugu and Sango of the Central African Republic), and a sample of 231 individuals of the population of Rome (Italy) have been typed for red cell esterase D using conventional electrophoresis and isoelectric focusing. The Subsaharan populations showed a high variability of the frequency of the EsD2 allele (0.018-0.138) and the absence of the EsD5 allele which, on the contrary, reached a polymorphic frequency (0.017) in the Italian sample. These results suggest that the EsD5 allele has a Caucasian origin.
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