Chromosomal inversion

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A chromosomal inversion is an abnormality where a group of genes in the chromosome has its order reversed.  There are two types of chromosomal inversions a paracentric inversion and a pericentric inversion. A paracentric inversion is where the inversion of the genes takes place but does not include the centromere of the chromosome. Whereas in a pericentric inversion the group of genes reversed does include the centromere  [1].

References 

  1. Daniel L. Hartl and Elizabeth W. Jones.(2009) Genetics analysis of genes and genomes, seventh edition, Sudbury: Jones and Bartlett Publishers (pages:275-277)
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