Complex sentence: One approach to studying the role of genetics for crime is to calculate the heritability coefficient, which describes the proportion of the variance that is due to actualized genetic effects for some trait in a given population in a specific environment at a specific time.
Split into simpler sentences: One approach to studying the role of genetics for crime is to calculate the heritability coefficient. It describes the proportion of the variance that is due to actualized genetic effects for some trait in a given population in a specific environment at a specific time.