STUDIES ON POLYMORPHISM SEGREGATION IN NORTHEASTERN BRAZIL .2. PAIRS OF RELATIVES

Two relatively large Northeastern Brazilian samples were analysed in o rder to study the intrafamilial behavior of several polymorphisms, thr ough pairs of relatives and sex distributions. Except for samples whic h include more than one paired observation per family, no excess of si gnificant departure from theoretical expectation was found. The excess verified both in mother x offspring and in sib pairs, when the entire offspring were included in the sample, testify to the sensitivity of the method to detect violations of the independence criterion. No asso ciations with sex were detected for any of the polymorphic systems stu died in both samples.