AIIMS 2012 Biology Question Paper for free online practice with solutions

Exchange of segments of non-sister chromatids between the chromosomes of a homologous pair is termed as crossing over. Translocation is the process of exchange of segments of two non-homlogous pail of chromosomes. Chromosomal aberration is the alteration in the chromosome number or structural changes within the chromosome.
Transformation is the process of transfer of DNA from one bacterial cell to another.