Gene knockout procedure deactivates the normal function of a gene to determine how it affects an organism. The correct option is B
What is gene knockout?
A knockout is used to regulate the expression of a gene, this happen when aa  particular gene is removed to prevent it from getting expressed in an individual or organism.
The gene can also be silence or inactivate.
Therefore, Gene knockout procedure deactivates the normal function of a gene to determine how it affects an organism. The correct option is B
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