Heritability:Heritability refers to the proportion of variation in a trait that can be attributed to genetic differences among individuals.
Twin studies: Twin studies are research studies that compare similarities between identical twins (who share 100% of their genes) and fraternal twins (who share about 50% of their genes) to determine the relative contributions of genetics and environment on a particular trait.
Gene-environment interaction: Gene-environment interaction refers to the interplay between an individual's genetic makeup and their environment, where genes can influence how individuals respond or adapt to different environmental conditions.