Resumo

LEJARRAGA, Horacio. Genetics of development and behaviour. Arch. argent. pediatr. [online]. 2010, vol.108, n.4, pp.331-336. ISSN 0325-0075.

Quantitative genetics can make a significant contribution to disentangle the relative influence of genetics and environment on human development and its disorders. Estimates of Pearson´s correlation coefficients between siblings, mono and dizogotic twins reared together or apart, allows the calculation of heredability, that is, the contribution of genetics to the variance of a given trait. In the case of many aspects of intellectual development, heredability is around 50%. The rests is attributable to the influence of environment. The influence of genetics on development should be considered as a trend, a risk, rather than a programmed fate.

Palavras-chave : Quantitative genetics; Development; Genetics and environment.

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