Isonymy has been described in a North Indian Hindu Community, which shows surname exogamy. A modification is suggested in the formula of Crow and Mange for the estimation of FIS to make it applicable to populations exhibiting clan exogamy. The values of FIS obtained by different methods are compared.
Summary. Saline extracts of 207 seed varieties belonging to 53 families were tested for haemagglutinating and haemolytic activity against the erythrocytes of eleven vertebrate species (man, monkey, rabbit, rat, goat, sheep, cow, buffalo, horse, mule and fowl). Of these, 85 seed extracts showed haemagglutinating activity and 49 seed extracts showed haemolytic activity against the red cells of one or more animal species. Several seed extracts were found to react in a species specific manner agglutinating or lysing the red cells exclusively of one animal species each. The possible practical application of the species specific plant agglutinins and haemolysins in characterising the red cells of different animal species is discussed.
INTRODUCTIONIt has long been established that seed extracts of certain plants agglutinate human and other animal erythrocytes (
A study of ability to taste PTC was made on two groups of Tibetans representing Eastern and Central Tibet, and on an allied Mongoloid group, namely Ladakhis, inhabiting the northern outskirts of India bordering the western frontiers of Tibet. Noteworthy varia tions were observed in the frequency of the non-taster allele in the populations under study, reflecting the pattern of variation within the Tibetan racial complex. Frequencies of the non-taster gene reported in various Mongoloid populations are discussed and a general trend of variation within the Mongoloid ethnic complex hypothesised.
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