Summary
Seven hypervariable VNTR loci have been studied in about 1200 parent/child pairs about equally divided between the sexes. Mutations were observed with all seven probes, the total number being 71. Fourty-four of these involved increased fragment length. Gains in fragment length were on average larger than losses. These findings indicate that mutation might be a basis for evolutionary expansion of VNTR fragment length. For five probes YNH24 (D2S44), MS31 (D7S21), g3 (D7S22), MS43A (D12S11), and CMM101 (D14S13), mutation rates were relatively low (less than 1%) with no obvious sex difference. MSI (D1S7) mutation frequencies were substantially higher, with a tendency towards a higher paternal than maternal mutation rate (5.4% and 2.0%, respectively). The probe B6.7 (provisionally assigned to chromosome 20) exhibits about five times higher paternal than maternal mutation rates. The mutation rate of 7.6% in paternal chromosomes is among the highest reported in any VNTR locus. These findings could indicate that while low-mutant VNTRs might reflect meiotic crossover, mutation events in high-mutant loci could more often be caused by other mechanisms during cell division.
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© 1993 Springer Basel AG
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Olaisen, B., Bekkemoen, M., Hoff-Olsen, P., Gill, P. (1993). Human VNTR mutation and sex. In: Pena, S.D.J., Chakraborty, R., Epplen, J.T., Jeffreys, A.J. (eds) DNA Fingerprinting: State of the Science. Progress in Systems and Control Theory. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-8583-6_6
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DOI: https://doi.org/10.1007/978-3-0348-8583-6_6
Publisher Name: Birkhäuser, Basel
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