Answer:
The statement given in the question is FALSE.
Step-by-step explanation:
The gene pool of all populations of living organisms contain alleles that habour beneficial, harmful and neutral mutations and any of these mutations can be expressed at anytime. A mutation is said to be beneficial if it increases the ability of the organism to survive; it is described as neutral if it does not impact any change. A harmful mutation on the other hand is one that impact the living organism negatively.