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Genome instability

1) A biological process consisting of chromosomal rearrangements and duplications. These phenotypes are often seen in the karyotype of cancer cells, where there is an imbalance between the mechanisms of cell-cycle control and mutation rates within aberrant genes. Ataxia telangiectasia is a disease that is resultant from mutations in the ATM gene, which is a cell cycle checkpoint gene. Nijmegen breakage syndrome is also a disease characterised by chromosomal and genomic instability.

2) An increased tendency of the GENOME to acquire MUTATIONS when various processes involved in maintaining and replicating the genome are dysfunctional.

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