Analysis of family resemblance in several bodies of data shows that about half of the variation in serum concentrations of IgM, IgA, and IgG is genetic. A substantial part of the remainder is due to twin shared environment, the effect of which is not significant for other relatives.

Original languageEnglish
Pages (from-to)8-14
Number of pages7
JournalHuman heredity
Issue number1
StatePublished - 1981


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