Pseudoautosomal repeat displays higher variability in Blacks than in Caucasians |
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Authors: | Gudrun A Rappold Anja Henke Marita Pohlschmid Titus H J Huisman |
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Institution: | (1) Institut für Humangenetik der Universität, Im Neuenheimer Feld 328, W-6900 Heidelberg, Germany;(2) Department of Cell and Molecular Biology, Medical College of Georgia, Augusta, Georgia, USA;(3) Imperial Cancer Research Fund, Lincoln's Inn Fields, WC2A 3PX London, UK |
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Abstract: | Summary DNA patterns from a pseudoautosomal variable number tandem repeat-like minisatellite (locus DXYS20) were compared in two samples: a Caucasian and a Black sample. We defined 3 types of DNA patterns named A, B and C, and found that these patterns have different frequencies in the Caucasian and Black groups. A set of alleles (the C group) in 48% of the Black sample is not found in the Caucasian sample. We also found a greater degree of fragment-size variability among Black individuals than among those of Caucasian origin. The large degree of ethnic variation indicates that this locus will be useful in population genetic studies. |
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