We did genetic test and the results are that she has a quadruplication of 16 p 11.2 i would like help at understanding this !

Faulty duplication: Consider the process like making a few copies on the office machine. You want the copier to produce true copies, not copies with a smudge or other problem. As the eggs form, the dna of the egg should have a true copy of the normal cell. With any duplication or deletion, this active process can add or delete small pieces of dna.