To what extent are behaviours and abilities determined by biological inheritance and to what extent by life experiences?

Aristotle and Lock firmly believed that we enter the world as a blank canvas, with our experiences the sole factor influencing our behaviour and capabilities. This poistion, empiricism, carried over into the behaviourism of Watson and Skinner. At the other extreme, Descartes was more strongly aslied with the nature campy and believed that we inherit our talents and abilities. Today, most researches take the middle road: acknowledging the profound influence of genes on learning and memory, while noting that a lifetime of experience modifies these influences.