Susceptibility to drug and alcohol addiction is partially genetic. For example, the human dopamine receptor DRD2 is associated with cocaine and alcohol abuse; individuals carrying an A nucleotide, instead of the more common C nucleotide, at a certain position within the sixth intron of the DRD2 gene are at a significantly increased risk of abuse. This variation in sequence is an example of …
A) a SNP.
B) a CNV.
C) an indel.
D) epistasis.
E) None of the above.

Question

Quizplus · Accepted Answer

This is an example of a single-nucleotide polymorphism (SNP), a polymorphism due to substitution of a single nucleotide.

Susceptibility to Drug and Alcohol Addiction Is Partially Genetic