Poaching is what it is called
If a p53 gene is defective it may cause cell cycle to stop functioning normally. Without this cell cycle check, cells will divide continuosly creating many chromosomal damage.
The term that describes the rearranging of genetic material between non homologous chromosomes without a net loss or gain of genetic material is Translocation.
Chromosomes translocation is an abnormality that results from the rearrangement of parts between non homologous chromosomes. A gene fusion may be created when the translocation joins two or else separated genes and is normally detected on karyotype of affected cells.