Answer:
There are four different types of chromosomal mutations: Deletions, Translocations, Duplications and Inversions (pictured below). Note that any chromosome mutation resulting in a significant loss of genetic material (Deletion) is most likely to be lethal.
deletion is where a section of a chromosome is removed.
translocation is where a section of a chromosome is added to another chromosome that is not its homologous partner.
inversion is where a section of a chromosome is reversed.
duplication occurs when a section of a chromosome is added from its homologous partner.
Chromosome mutations are often lethal as the chromosome structure is altered.