An animal researcher inserts into the body of a mouse a genetic substance that is designed to prevent neurons from responding to dopamine.The researcher then observes the mouse to determine the impact of the absence of dopamine on the mouse's behaviour.This researcher has just utilized what is called the:

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The gene knockout procedure involves disabling or "knocking out" a specific gene in an organism, which results in the absence of the protein that the gene encodes. In this scenario, the genetic substance inserted into the mouse is likely designed to block or disable the gene responsible for producing dopamine receptors in the neurons. Therefore, the researcher has utilized the gene knockout procedure to study the impact of dopamine on the mouse's behavior.

An Animal Researcher Inserts into the Body of a Mouse