Genetic and Environment Analysis for General Intelligence of Twins during Early Childhood

Abstract:

The classical twin study provided robust information regarding the contribution of genetics and environment propensities on the general intelligence of twins. The twin study has been planned to assess the impact of genetics and environment on general intelligence. This investigation was performed in the Bhiwani and Hisar districts of state of Haryana. A sample of 150 pairs of twins in the age groups of 3-6 years was attained from 55 villages of two districts. Results of heritability estimates showed that the contribution of genetics for general intelligence ranged from 45 to 63% for 3-6 years of twins. The conclusion of heritability estimates indicated that the impact of genetic factors on the general intelligence of twins was greater than the environmental factors.