Heredity & Environment
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When conducting a detailed psychological and genetic analysis of the relative influences and interactions of 'heredity' and 'environment' on human development, which of the following statements is most authoritative and scientifically true regarding the three types of 'Gene-Environment Correlation' (rGE)—'passive', 'evocative/reactive', and 'active/niche-picking'—proposed by Robert Plomin and his colleagues, alongside 'Gene-Environment Interaction' (G x E Interaction)?
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Detailed Explanation
Understanding Gene-Environment Interaction and Correlation
In human development, no single trait or behavior is solely the result of genetics or environment; rather, it is the product of a complex interaction between both (G x E Interaction). According to Robert Plomin, gene-environment correlation (rGE) explains how our genes influence our environmental experiences.
- Gene-Environment Interaction (G x E): Option (b) correctly defines this concept, stating that genetically distinct individuals respond differently to the same environmental conditions based on their genetic vulnerability or sensitivity.
- Passive rGE: Occurs when biological parents provide both the genes and the rearing environment.
- Active rGE ('Niche-picking'): Occurs when individuals seek out environments that correspond to their genetic predispositions.
- Evocative rGE: Occurs when a child's genetically influenced attributes evoke specific responses from others in their environment.
Therefore, option (b) represents the most scientifically accurate statement regarding G x E interaction.
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