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High heritability of a trait, consequently, does not necessarily mean that the trait is not very susceptible to environmental influences. [8] Heritability can also change as a result of changes in the environment, migration, inbreeding, or how heritability itself is measured in the population under study. [9]
Trait A shows a high sibling correlation, but little heritability (i.e. high shared environmental variance c 2; low heritability h 2). Trait B shows a high heritability since the correlation of trait rises sharply with the degree of genetic similarity. Trait C shows low heritability, but also low correlations generally; this means Trait C has a ...
Sociobiology is a field of biology that aims to explain social behavior in terms of evolution.It draws from disciplines including psychology, ethology, anthropology, evolution, zoology, archaeology, and population genetics.
When distinguished, biological determinism is used to mean that heredity is the only factor. Supporters of hereditarianism reject this sense of biological determinism for most cases. However, in some cases genetic determinism is true; for example, Matt Ridley describes Huntington's disease as "pure fatalism, undiluted by environmental ...
The Bell Curve: Intelligence and Class Structure in American Life is a 1994 book by the psychologist Richard J. Herrnstein and the political scientist Charles Murray in which the authors argue that human intelligence is substantially influenced by both inherited and environmental factors and that it is a better predictor of many personal outcomes, including financial income, job performance ...
Narcissism was found to have a high heritability score (0.64) indicating that the concordance of this trait in the identical twins was significantly influenced by genetics as compared to an environmental causation. It has also been shown that there is a continuum or spectrum of narcissistic traits ranging from normal to a pathological personality.
Epigenetic mechanisms. In biology, epigenetics is the study of heritable traits, or a stable change of cell function, that happen without changes to the DNA sequence. [1] The Greek prefix epi-(ἐπι-"over, outside of, around") in epigenetics implies features that are "on top of" or "in addition to" the traditional (DNA sequence based) genetic mechanism of inheritance. [2]
Dual inheritance theory (DIT), also known as gene–culture coevolution or biocultural evolution, [1] was developed in the 1960s through early 1980s to explain how human behavior is a product of two different and interacting evolutionary processes: genetic evolution and cultural evolution.