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J Med Genet. 1992 Oct;29(10):699-703.

A non-isotopic in situ hybridisation study of the chromosomal origin of 15 supernumerary marker chromosomes in man.

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  • 1Wessex Regional Genetics Laboratory, Salisbury District Hospital, Odstock, Wiltshire.


Fifteen patients presenting with mosaic or non-mosaic karyotypes containing a distamycin-DAPI negative de novo or familial supernumerary marker chromosome were studied with non-isotopic in situ hybridisation using a library of alphoid centromere specific and satellite II/III probes. The in situ hybridisation studies showed that seven markers were derived from satellited autosomes (three chromosome 13/21, two chromosome 14, two chromosome 22), six from non-satellited autosomes (two chromosome 4, one chromosome 12, one chromosome 16, two chromosome 19), and one from the Y chromosome. One non-mosaic marker was negative for all the alphoid and satellite II/III probes used.

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