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heritabil
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There are 9 letters in HERITABIL ( A1B3E1H4I1L1R1T1 )
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Definitions of heritabil in various dictionaries:
HERITABIL - Research on heritability of IQ implies, from the similarity of IQ in closely related persons, the proportion of variance of IQ among individuals in a...
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Research on Heritability of IQ implies, from the similarity of IQ in closely related persons, the proportion of variance of IQ among individuals in a study population that is associated with genetic variation within that population. This provides a maximum estimate of genetic versus environmental influence for phenotypic variation in IQ in that population as environmental factors may be correlated with genetic factors. "Heritability", in this sense, "refers to the genetic contribution to variance within a population and in a specific environment". In other words, heritability is a mathematical estimate that indicates an upper bound on how much of a trait's variation can be attributed to genes. There has been significant controversy in the academic community about the heritability of IQ since research on the issue began in the late nineteenth century. Intelligence in the normal range is a polygenic trait, meaning that it is influenced by more than one gene.The heritability of IQ for adults is between 57% and 73% (with some more-recent estimates as high as 80% and 86%.) Genome-wide association studies have identified inherited genome sequence differences that account for 20% of the 50% of the genetic variation that contributes to heritability. IQ goes from being weakly correlated with genetics, for children, to being strongly correlated with genetics for late teens and adults. The heritability of IQ increases with age and reaches an asymptote at 18–20 years of age and continues at that level well into adulthood. This phenomenon is known as the Wilson Effect. Recent studies suggest that family and parenting characteristics are not significant contributors to variation in IQ scores; however, poor prenatal environment, malnutrition and disease can have deleterious effects. |