Write a brief note on chromosomal mutations and gene mutations

Explanation

(a) Chromosomal mutations : Any change in the number or structure of chromosomes are called chromosomal mutations. They may be
(a) Structural changes : During prophase I of Meiosis, homologous regions of chromosomes show many changes in structure inorder to form pairs or bivalents. They are :
(1) Deletion : A part of chromosome is lost or broken.
(2) Duplication : A particular part of chromosome is repeated
(b) Gene Mutations : Mutations which occur due to change in a single base pair of DNA are called gene mutations or point mutations.