Types Numerical - change in no.Structural – change in structure

Structural abnormalities1. Translocations2. Deletions3. Insertions 4. Inversions 5. Duplication

Translocation

Segments from two different chromosomes are exchanged

Deletions A portion of chromosome is missing or deleted

DuplicationA portion of chromosome is duplicated

Insertions A segment of chromosome breaks off,and attaches to another chromosome

1.Artificially:

It can be produces by X-irradiation in laboratory, Chromosome break into pieces, these pieces reattach in inverted form.

Morphology of the chromosome will not be change