Trisomy 21 Down syndrome. II. Structural chromosome rearrangements in the parents.


In a series of 374 families with Down syndrome progeny, structural chromosome rearrangements were detected in the parents of six children with regular trisomy. The aberrations were reciprocal translocations and inversions. In all three informative families, the parent who transmitted the extra chromosome was not the one with the structural rearrangement… (More)


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