What are Chromosomal Aberrations? 

By Jack Loren 

September 23, 2023

Chromosomal aberrations are visible changes in the structure of chromosomes

These include changes either in the number or in the arrangement of genes in a chromosome. 

These are also called structural aberrations

They mainly occur during reduction division. 

Causes of chromosomal aberrations – 

Chromosomal aberrations are produced due to chromosome breakage and irregularities in the rejoining of broken pieces. 

Breaks in the chromosomes can be induced by radiation (X–rays, gamma rays, –rays, chemical mutagenic agents like insecticides, herbicides, base analogies and by several viruses.  

Some genes also induce chromosome breakage. 

Structural changes in chromosomes –