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Rare chromosome 20 variants encountered during prenatal diagnosis
Authors:Dr Michael B Petersen
Abstract:A case with an uncommon heteromorphism in the centromeric region of chromosome 20, var (20) (cen, CBG 50), and a family with a pericentric inversion of chromosome 20, inv (20) (p11.23q11.21), are reported, both detected in amniotic fluid cell cultures. It appears that small pericentric inversions of chromosome 20 have a low risk of recombination.
Keywords:Centromeric heterochromatin  Chromosome 20  Inversion  Risk of recombination  Variation
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