Researchers found links between Marijuana dependence and specific genetic cues. By analyzing SNPs between test subjects with marijuana dependence and subjects without to observe the genetic differences. The study showed that there are 3 genetic variations that code for marijuana dependency. One of these variants is located in the gene that controls calcium levels in the blood (Rettner, 2016). Another is located in the gene that manipulates the growth of the central nervous system. The last gene is what sends signals to the body for depression.
Marijuana dependency can certainly be heightened with individuals genetic make up. Take for example those who suffer from alcoholism; there are studies that say this can be passed down through generations, making it a genetics issue. Hence, it is within reason to believe that dependence of marijuana can be heightened by a person's genes.