01:830:331 Chapter Notes - Chapter 2.2: Quantitative Trait Locus, Epigenetics, Methyl Group
27 Jan 2017
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Document Summary
As babies, sadie was calm and easily comforted, but molly was fussy and hard to soothe. When they entered school, sadie relished contact with other people and preferred play that involved others. Meanwhile, molly was more withdrawn and was quite happy to play alone. Many behavioral and psychological characteristics (including intelligence and aspects of personality) are distributed with a few individuals at the end of the continuum and most near the middle. Genotypes reflect polygenic inheritance (when phenotypes are the result of the combined activity of many separate genes) The behavioral consequences of genetic instructions depend on the environment in which those instructions develop. Ways gene and environment interact: range of reaction (early approach) the range of possible phenotypes (traits or behaviors) that exist for a particular genotype. Genes set boundaries; environment determines which possible outcomes actually materialize. Reaction range model: the environment only affects how much of a trait is expressed (limited view of environmental influences)
