Copy Number Variation

Copy Number Variation (CNV) is a type of genetic variation that occurs when a region of DNA (or gene) is present in multiple copies. This variation can be either an extra copy of the gene or missing copies, with either leading to changes in the expression of the gene. CNV, particularly large-scale CNVs, has now been associated with a variety of conditions including autism, ADHD, cancer, and schizophrenia. CNV plays an important role in understanding how genetic variation relates to disease. It enables researchers to identify and target specific changes that may be causing the disease, uncovering new causative factors and therapeutic targets. Furthermore, tools such as genotyping arrays, sequencing, and biochip technology are increasingly used to identify and measure CNV patterns in the genome, providing insight into how CNV might influence gene expression and susceptibility to certain diseases.