Mirror image duplications of chromosome 21. Three new cases and discussion of the mechanisms of origin |
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| Authors: | R A Pfeiffer J Loidl |
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| Institution: | (1) Institut für Humangenetik und Anthropologie der Friedrich-Alexander-Universität Erlangen-Nürnberg, Bismarckstrasse 10, D-8520 Erlangen, Federal Republic of Germany |
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| Abstract: | Summary Three new cases of  mirror image duplication of a chromosome 21 are studied. In the first case the extra chromosome derived from a single paternal chromosome 21 by intrachromosomal interchange. The analysis of similar published cases suggests that this mechanism may predominate, but interchromosomal interchange, para- and pericentric inversion are likely as well. |
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