Block Mutations

Block mutations are changes to segments of a chromosome, leading to large scale changes to the DNA of an organism

  • Block mutations are commonly caused by transposons, which, by changing positions within the genome, alter gene sequence

Several types of block mutations exist, including: 

  • Duplications – part of chromosome is copied, resulting in duplicate sections (potentially increases gene expression)
  • Deletions – a portion of the chromosome is removed (along with any genes contained within this segment)
  • Inversions – a segment of a chromosome is removed and then replaced within the chromosome in reverse order
  • Translocations – segments of two chromosomes are exchanged (may interrupt gene sequences)

Types of Block Mutations

Block mutations