Genetic contributions to human fatness: an adoption study

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Abstract
A strong relationship was found between the degree of fatness of biologic mothers and that of their adult offspring who had been separated from their mothers at birth and adopted during the first year of life. This relationship persisted even after age, height, and possible confounding environmental factors were controlled. There was little evidence for either selective placement on the basis of parental fatness or gene-environment interaction. There was no relationship between the degree of fatness of adoptive parents and that of the adoptees. Two indexes of environmental influence-rural upbringing and disturbance in the adoptive home-predicted fatness among adoptees.

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