English: *en:XXX syndrome due to problems in male M II-stage.
Blue circles are male cells.
Blue bars are Y-chromosomes
Pink circles are female cells.
Pink bars are X-chromosomes.
MI corresponds to the first stage in meiosis
MII corresponds to the second stage in meiosis
Problems with cell division in the M II-stage in the male results in a cell with 2 X-chromosomes. When this cell fuses with a female cell the offspring will have 3 X-chromosomes (pink cell in the center)
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{{Information |Description={{en|*en:XXX syndrome due to problems in male M II-stage. *Blue cirkels are male cells. *Blue bars are Y-chromosomes *Pink cirkels are female cells. *Pink bars are X-chromosomes. *MI corresponds to the first stage in meiosi