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Weak Genetic Explanation 20 Years Later
Weak Genetic Explanation 20 Years Later

... genes with specifiable neurological and then behavioral consequences, eventually compelling people to dissolve their marriages, our conception of divorce would have to change. It would be more than just adding divorce to the long list of characteristics that are genetically influenced; we would be a ...
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... The inheritance is complex because if both the parents have the same eye color the child is likely to get the same colored eyes but if the recessive gene of both parents is also the same then the child can even get the color of the recessive gene of both parents but if the recessive gene of both par ...
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outline File - selu moodle

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Genetics - Fort Bend ISD

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best_genes_for_the_job_lesson-new

... and psychologically. A person’s genetic constitution is called a genotype. The expression of that genotype in a given environment – a set of observable characteristics of that individual – is their phenotype. A genotype by environment (or GxE) interaction causes variability in phenotype when environ ...
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Notes 1 Ch 23 Evolution_Pop

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Wheeler Quantitative Genetics

... to both the additive breeding value and the nonadditive interaction effects. Thus, H2 = (σ2A + σ2I) / (σ2A + σ2I + σ2E) Consequently, broad sense heritability is typically larger than narrow sense heritability and progress in achieving genetic gain can be faster when clonal selection is possible. Wh ...
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Heritability of IQ

Research on heritability of IQ infers 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. ""Heritability"", in this sense, ""refers to the genetic contribution to variance within a population and in a specific environment"". 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. However, certain single gene genetic disorders can severely affect intelligence, with phenylketonuria as an example.Estimates in the academic research of the heritability of IQ have varied from below 0.5 to a high of 0.8 (where 1.0 indicates that monozygotic twins have no variance in IQ and 0 indicates that their IQs are completely uncorrelated). Some studies have found that heritability is lower in families of low socioeconomic status. IQ heritability increases during early childhood, but it is unclear whether it stabilizes thereafter. A 1996 statement by the American Psychological Association gave about 0.45 for children and about .75 during and after adolescence. A 2004 meta-analysis of reports in Current Directions in Psychological Science gave an overall estimate of around 0.85 for 18-year-olds and older. The general figure for heritability of IQ is about 0.5 across multiple studies in varying populations. Recent studies suggest that family environment (i.e., upbringing) has negligible long-lasting effects upon adult IQ.
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