Localization of FISH signals in human blastomeres identified as euploid and aneuploid by superimposing concentric grid maps to each nucleus. In both blastomeres, FISH signals corresponding to chromosomes 13 (green), 18 (pink), 21 (orange), and X (yellow) are shown. Note the difference in chromosomal location between euploid and anueploid see L.J.McKenzie et al., pp. 2231-2237.
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