 In other cases, there are structural alterations (chromosomal translocations, deletions ...) that modify the standard chromosomal complement.In these cases, it is indicated that the affected organism presents genome instability (also "genetic instability", or even "chromosomic instability").The process of genome instability often leads to a situation of aneuploidy, in which the cells present a chromosomic number that is either higher or lower than the normal complement for the species.