In childhood neuroblastoma, the N-myc oncogene undergoes which type of mutation of normal gene to oncogene?

Name: In childhood neuroblastoma, the N-myc oncogene undergoes which type of mutation of normal gene to oncogene?
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Amplifications are the result of the duplication of a small piece of a chromosome over and over again; consequently, instead of the normal two copies of a gene, tens or even hundreds of copies are present. The N-myc oncogene is amplified in 25% of childhood neuroblastoma.

In Childhood Neuroblastoma, the N-Myc Oncogene Undergoes Which Type of Mutation