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Female and male karyotypes of Lucilia cluvia (a–b) and Lucilia sericata (c–d), 2n = 10 + XX/XY, stained with 3% Giemsa. X, Y = sex chromosomes. Arrowheads show the secondary constriction in chromosome 2. Arrows show the secondary constriction in the X chromosomes. Asterisks indicate the satellite. Bar = 10 μm.
