Active Genotype-Environment Correlation
A genotype-environment correlation (rGE) is when exposure to situational or environmental situations or circumstances are dependent on the genotype of the individual.
Active genotype–environment correlation starts around the ages of 8-9 and is when children begin to seek out situations and environments ('niches') that are compatible with their genotype. These niches that are chosen will strengthen the gene expression.
For instance, a child who is naturally athletic may begin to start playing sports in a more serious manner at this point in their lives. Or a child who is outgoing and talkative may seek out highly social activities while a child who is more introverted may be more interested in science or reading.