Nurdagi City Of Turkey for Genes do not determine every aspect of our physiological and behavioral development. Instead, genes determine the boundaries or limits within which our physiological and behavioral attributes are at liberty to adapt to the environment. The genes that give us opposable thumbs, for instance, do not determine whether we should plant potatoes or use sickles to harvest grain. They do make these and many other activities possible. Were we endowed with paws or hooves instead, our range of adaptation to the environment, and the types of food we consume, would be much more limited. In describing the boundaries of adaptation with which each organism must contend, biologists use the term reaction range. A reaction range is the range within which an organism’s physical traits or behaviors may develop given a particular environment and the limitations imposed by its genetic inheritance. Nurdagi City Of Turkey 2016.