This gene duplication has created a<unk> . The chromosome now has two copies of this section of DNA, rather than one.<unk>  <unk>  is a phenomenon in which sections of the genome are repeated and the<unk>  of repeats in the genome varies between individuals.<unk>  is a type of structural<unk> : specifically, it is a type of duplication or deletion event that affects a considerable<unk>  of base pairs. Approximately two-thirds of the entire human genome may be composed of repeats and 4.8–9.5% of the human genome can be classified as<unk> s. In mammals,<unk> s play an important role in generating necessary<unk>  in the population as well as disease phenotype.<unk> s can be generally categorized into two main groups: short repeats and long repeats. However, there are no clear boundaries between the two groups and the classification depends on the nature of the loci of interest. Short repeats include mainly dinucleotide repeats (two repeating nucleotides e.g. A-C-A-C-A-C...) and trinucleotide repeats. Long repeats include repeats of entire genes. This classification based on size of the repeat is the most obvious type of classification as size is an important factor in examining the types of mechanisms that most likely gave rise to the repeats, hence the likely effects of these repeats on phenotype.
Copy number variation
Chromosomal translocation
Gene duplication
Germline mutation
Defocus aberration
Postzygotic mutation
Robertsonian translocation
Low copy repeats