The front cover shows labelling of individual chromosomes from an infertile man with high aneuploidy rates, using (A) antibodies again synaptonemal complex proteins (red) a late recombination protein (green) and centromeres (blue) and (B) chromosome specific probes were used to identify specific chromosomes 13 (green) and 18 (blue) and 21 (red) by FISH. See Ma et al., pp. 980-985.
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