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The cytologically invisible inversions in a t-haplotype. The left chromosome is a normal one. The chromosome bands are indicated as they would have been seen with the techniques available in the 1970s. The inversions in a t-haplotype occur between bands A2 and D as indicated by arrows, highlighted with a light gray box. Without modern cytological techniques, these would not have been detectable. (This diagram has been modified from Lyon et al. 1988.)
