The boys and their families has assumed they were fraternal twins, who share genes only as much as siblings do and therefore don't look alike. Despite seemingly inexhaustible interest in the nature/nurture debate, we are only starting to learn how the interaction of genes with experience may alter the potential of individuals, and to see how individual decision-making styles can alter the potential wealth of nations.Ī captivating news image I saw this year depicted two sets of identical twins, mixed up as infants and raised in separate families in Colombia. However, we know racial and ethnic groups may also be exposed to vastly different experiences likely to strongly affect behavior. When fear and tension rise across racial and ethnic divisions, as they have in recent years, genetic arguments to explain behavioral differences can quickly become popular.
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